{"title":"Allen-Bradley 1794 Flex I\/O","description":"\u003cp\u003eThe Allen-Bradley 1794 Flex I\/O series is a modular, distributed I\/O platform designed to reduce engineering costs and installation time by providing a flexible, rackless architecture for complex industrial control systems. Engineered for high-density applications, this series allows users to mix and match digital, analog, and specialty modules on a variety of terminal bases to suit specific field-side wiring requirements. The 1794 system supports multiple industrial networks, including EtherNet\/IP, ControlNet, and DeviceNet, through interchangeable adapter modules. Its unique \"removal and insertion under power\" (RIUP) capability ensures maximum system uptime by allowing module replacement without disrupting the backplane power or communication. With its compact footprint and support for HART protocol and extreme environment versions (XT), the Flex I\/O series remains a preferred choice for distributed intelligence in process control and manufacturing environments.\u003c\/p\u003e","products":[{"product_id":"1794-ie12-allen-bradley-flex-i-o-high-density-analog-input-module","title":"1794-IE12 Allen-Bradley Flex I\/O High-Density Analog Input Module","description":"\u003ch3\u003eProduct Introduction\u003c\/h3\u003e\n\u003cp\u003eAutomation engineers integrate the \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1794-IE12\u003c\/strong\u003e Series Flex I\/O High-Density Analog Input Module to aggregate multi-channel sensor data across distributed control architectures. This advanced \u003cstrong\u003e1794-IE12\u003c\/strong\u003e device features twelve single-ended channels supporting precise current and voltage conversions. \u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e: Instrumentation techs frequently deploy this high-density module on remote valve skids to minimize panel footprint while maintaining strict 16-bit measurement accuracy for loop controllers.\u003c\/p\u003e\n\u003ch3\u003eConfiguration Breakdown \u0026amp; Technical Parameters\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem Parameter\u003c\/th\u003e\n\u003cth\u003eTechnical Specification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand \u0026amp; Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \/ \u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1794-flex-i-o\"\u003e\u003cstrong\u003eFlex I\/O\u003c\/strong\u003e\u003c\/a\u003e Series \/ \u003cstrong\u003e1794-IE12\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCatalog Number \/ Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1794-IE12\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwelve (12) single-ended channels (0-20mA, 4-20mA, +\/-10VDC, 0-10VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution \u0026amp; Conversion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16-bit 2's complement; 320 uV\/cnt (Voltage), 0.641 uA\/cnt (Current)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConversion Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.0 ms across all channels (Quick Step mode available at 0.09 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminal Base Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1794-TB3G or 1794-TB3GS (Keyswitch Position 3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower \u0026amp; Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal supply (10.0 to 31.2 VDC range); 1.2W power dissipation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOperating temp 0 to 55°C; Vibration 5g @ 10-500 Hz; Shock 30g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePacking List \u0026amp; Warranty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1794-IE12\u003c\/strong\u003e Flex I\/O Analog Input Module\u003c\/li\u003e\n\u003cli\u003eFactory inspection sheet and official 12-month warranty documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; Maintenance Guidelines\u003c\/h3\u003e\n\u003cdiv\u003eEnsure the terminal base keyswitch is locked securely at position 3 before mounting the module to prevent electrical mismatch.\u003c\/div\u003e\n\u003cdiv\u003eVerify that the external 24 VDC power supply remains strictly within the 10.0 to 31.2 VDC threshold to avoid conversion errors.\u003c\/div\u003e\n\u003cdiv\u003eMaintain clean grounding practices and use shielded triax or twisted-pair wiring to protect low-level analog signals from plant noise.\u003c\/div\u003e\n\u003cdiv\u003eInspect terminal base spring-clamp connections annually to prevent intermittent contact resistance on sensitive current loops.\u003c\/div\u003e\n\u003ch3\u003eCompatibility \u0026amp; Certifications\u003c\/h3\u003e\n\u003cdiv\u003eFully compatible with standard Flex I\/O communication adapters and 1794-TB3G\/1794-TB3GS terminal bases.\u003c\/div\u003e\n\u003cdiv\u003eEngineered with open-type enclosure designs meeting rigorous industrial shock and vibration standards.\u003c\/div\u003e\n\u003cdiv\u003eMeets international safety compliance parameters for industrial automation signal processing equipment.\u003c\/div\u003e\n\u003ch3\u003eShipping \u0026amp; Logistics\u003c\/h3\u003e\n\u003cdiv\u003eGlobal express courier delivery supported via DHL, FedEx, and UPS networks.\u003c\/div\u003e\n\u003cdiv\u003ePriority order handling guarantees warehouse dispatch within 24 to 48 hours.\u003c\/div\u003e\n\u003cdiv\u003eProtective anti-static cushioning secures sensitive internal microprocessors during international transit.\u003c\/div\u003e\n\u003ch3\u003eTypical Applications \u0026amp; Diagnostic Capabilities\u003c\/h3\u003e\n\u003cdiv\u003eContinuous multi-channel pressure, flow, and temperature transmitter monitoring in chemical plants.\u003c\/div\u003e\n\u003cdiv\u003eWater treatment telemetry panels requiring high-density analog aggregation.\u003c\/div\u003e\n\u003cdiv\u003eRapid identification of input channel overloads via status LEDs and diagnostic register flags.\u003c\/div\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e What causes the \u003cstrong\u003e1794-IE12\u003c\/strong\u003e to register erratic readings on a 4-20mA current loop?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e Ground loops or failing shield terminations typically inject common-mode noise, skewing the 16-bit conversion values across active channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e Why is keyswitch position 3 mandatory when installing the \u003cstrong\u003e1794-IE12\u003c\/strong\u003e?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e The mechanical keying configuration prevents operators from accidentally plugging a high-voltage or incompatible module into the wrong terminal base.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e How does Quick Step mode affect signal response time on this analog module?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e Quick Step filtering reduces input step response time from 1.3 seconds down to 0.09 seconds for applications requiring rapid dynamic tracking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e Can maintenance technicians swap the \u003cstrong\u003e1794-IE12\u003c\/strong\u003e under power without shutting down the rack?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e Yes, Flex I\/O architecture supports Removable Terminal Blocks (RTB), allowing module replacement while backplane power remains active if permitted by local safety protocols.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e What is the significance of the 0.1% full-scale absolute accuracy specification?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e It guarantees high measurement precision at 25°C, ensuring that calibration drift stays minimal across long-term industrial operations.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013908160694,"sku":"1794-IE12","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IE12.jpg?v=1784790097"},{"product_id":"1794-ob16-allen-bradley-flex-i-o-16-channel-sourcing-dc-module","title":"1794-OB16 Allen Bradley Flex I\/O 16 Channel Sourcing DC Module","description":"\u003ch2\u003e\u003cb\u003e1794-OB16 24V DC Sourcing Output Architecture\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OB16\u003c\/b\u003e\u003c\/span\u003e is a high-density, 16-channel discrete DC sourcing output module designed for the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley Flex I\/O Series\u003c\/b\u003e\u003c\/span\u003e by Rockwell Automation. Built for driving 24V DC field actuators, this module provides current-sourcing outputs operating across a supply voltage envelope of 19.2 to 31.2V DC (nominal 24V DC, including 5% AC ripple). Each output delivers up to 500 mA, supporting an overall aggregate load current of 8.0 A across all 16 channels. The solid-state output circuitry features high-speed propagation times of ≤0.5 ms for OFF-to-ON and ≤1.0 ms for ON-to-OFF transitions. It mounts to terminal base units including 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, and 1794-TB3SK using Keyswitch Position 2, drawing 80 mA from the 5V DC Flexbus backplane while providing 850V DC isolation between field power and logic buses for 1 second.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications Summary\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwell Automation \/ \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCatalog Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OB16\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eProduct Line\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eFlex I\/O Series\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eModule Function\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDigital DC Sourcing Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOutput Density\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e16 Non-Isolated Sourcing Outputs (1 Group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Operating Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e24V DC (Operating Range: 19.2 to 31.2V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eChannel Current Capacity\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1.0 mA min to 500 mA max per channel (8.0 A total module aggregate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eSurge \/ Inrush Current Rating\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2.0 A for 50 ms (repeatable every 2 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOn-State Voltage Drop\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0.5V DC maximum @ 0.5 A load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOff-State Leakage Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0.5 mA maximum @ 31.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eSignal Switching Delay\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOFF-to-ON: ≤0.5 ms | ON-to-OFF: ≤1.0 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eSystem Isolation Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTested @ 850V DC for 1 s (Field to System); 50V continuous isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eFlexbus Current Draw\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e80 mA @ 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eExternal DC Supply Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e49 mA nominal @ 24V DC (38 mA to 65 mA range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePower \u0026amp; Thermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e5.3 W max @ 31.2V DC | 18.1 BTU\/hr max @ 31.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCompatible Terminal Bases\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eBase Keyswitch Position\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePosition 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eRecommended Fuse Protection\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSAN-O MQ4-800 mA external fuses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCertifications \u0026amp; Standards\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ec-UL-us, CSA, CE, Ex, TÜV, KC, EAC, RCM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePhysical Dimensions \u0026amp; Weight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) | 78 g (2.75 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eTarget Equipment \u0026amp; Field Application Scenarios\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 24V DC current-sourcing capability of the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OB16\u003c\/b\u003e\u003c\/span\u003e makes it standard hardware across automated manufacturing lines and machinery enclosures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect control of 24V DC pneumatic directional solenoid valves on packaging equipment\u003c\/li\u003e\n\u003cli\u003eDriving 24V DC interposition relays and contactor coils inside distributed motor control cabinets\u003c\/li\u003e\n\u003cli\u003eActuating 24V industrial LED stack lights, panel indicators, and audible alarm buzzers\u003c\/li\u003e\n\u003cli\u003eInterfacing discrete output triggers to variable frequency drives (VFD) digital input terminals\u003c\/li\u003e\n\u003cli\u003eControlling high-speed sorting gates, diverters, and part ejectors on conveyor systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Visuals \u0026amp; Circuit Protection Capabilities\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eField diagnostics and integrated protective mechanisms simplify system monitoring and field maintenance:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eField-Side LED Indicators:\u003c\/b\u003e Sixteen yellow status LEDs aligned on the front housing provide clear visual indication when output driver gates are activated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInrush Surge Suppression:\u003c\/b\u003e Integrated transistor protection handles transient surge currents up to 2.0 A for 50 ms, accommodating inductive coil inrush without tripping outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptocoupler Backplane Protection:\u003c\/b\u003e Optoisolators safeguard internal Flexbus logic circuits against field-side electrical noise and voltage transients up to 850V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Express Shipping \u0026amp; Warranty Terms\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Condition:\u003c\/b\u003e 100% Brand New, Original Factory Sealed Stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Period:\u003c\/b\u003e Covered by a Complete 12 Months Replacement Warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDispatch Handling:\u003c\/b\u003e Orders ship within 24 to 48 hours following confirmation\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWorldwide Express Delivery:\u003c\/b\u003e Fast international transit via FedEx, UPS, or DHL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OB16\u003c\/b\u003e\u003c\/span\u003e is one of the most widely deployed DC output modules in the Flex I\/O ecosystem due to its high density and low power footprint. However, because this module lacks internal electronic short-circuit protection, an accidental short on a 24V field wire directly connected to an output pin will permanently damage the internal output transistor. To prevent hardware damage during commissioning or wire degradation, we strongly recommend installing external SAN-O MQ4-800 mA fast-acting fuses on individual output channels or utilizing a fused terminal base assembly. Furthermore, when switching inductive coils, fitting suppression diodes across field load terminals absorbs back-EMF spikes and prevents premature transistor fatigue.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What causes an output channel on this module to fail permanently in a closed (always ON) position?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Overcurrent shorts or high inductive voltage spikes exceeding the transistor's thermal limits typically break down the solid-state output junction, causing it to short internally and stay ON; installing SAN-O MQ4-800 mA fuses prevents this failure mode.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can field loads requiring 12V DC power be driven reliably using this output card?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Yes; the module supports an ON-state voltage range from 10V DC up to 31.2V DC, allowing it to switch 12V DC control loads provided the auxiliary power supply matches the load voltage requirement.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How many of these discrete output modules can be installed under a single Flex I\/O adapter node?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Up to eight modules can be mounted sequentially on a single Flex I\/O backplane cluster, provided the total 5V DC Flexbus current draw of all cards does not exceed the adapter's power supply rating.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why does a 24V LED indicator connected to an inactive channel stay faintly illuminated?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e The 0.5 mA off-state leakage current inherent to solid-state output transistors can pass enough residual energy to faintly light high-efficiency LED indicators; placing a parallel resistor across the load bleeds off this voltage.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Selection Guide: How do I choose between specifying the 1794-OB16 sourcing card and the 1794-OV16 sinking output card?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Select the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OB16\u003c\/b\u003e\u003c\/span\u003e when field actuators require current-sourcing logic (+24V DC switched to the load). Select the 1794-OV16 when field equipment utilizes current-sinking logic (DC Common switched to the load).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OB16.png?v=1784618342\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013908488374,"sku":"1794-OB16","price":148.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OB16_2_2387b7ba-42d3-47d1-85d2-74a19b46fbad.jpg?v=1784618328"},{"product_id":"1794-oc16-allen-bradley-flex-i-o-16-channel-sourcing-output-module","title":"1794-OC16 Allen Bradley Flex I\/O 16 Channel Sourcing Output Module","description":"\u003ch2\u003e\u003cb\u003e1794-OC16 High-Density Sourcing Output Architecture\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OC16\u003c\/b\u003e\u003c\/span\u003e is a high-density, 16-channel digital DC sourcing output module engineered for the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley Flex I\/O Series\u003c\/b\u003e\u003c\/span\u003e by Rockwell Automation. Built specifically for driving higher-voltage DC actuators, this unit delivers current-sourcing outputs rated for a nominal 48V DC line (operating range 30 to 60V DC, including 5% AC ripple). It accommodates up to 500 mA per channel, enabling an aggregate module load capacity of 8.0 A. High-speed solid-state switching logic achieves rapid signal propagation with an OFF-to-ON response time of ≤0.5 ms and an ON-to-OFF response time of ≤1.0 ms at 25 °C (≤2.0 ms at 55 °C). The module plugs into terminal base units including 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, and 1794-TB3SK set to Keyswitch Position 2, drawing a low 80 mA from the 5V DC Flexbus backplane while providing 1900V DC isolation between user-side power and system logic for 1 second.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications Summary\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwell Automation \/ \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCatalog Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OC16\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eProduct Series\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eFlex I\/O Series\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eModule Function\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDigital DC Sourcing Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOutput Density\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e16 Non-Isolated Sourcing Channels (1 Group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Operating Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e48V DC (Range: 30 to 60V DC @ 45 °C; 30 to 55V DC @ 55 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eChannel Current Capacity\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2.0 mA min to 500 mA max per channel (8.0 A total module aggregate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eInrush \/ Surge Capacity\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4.0 A peak for 10 ms (repeatable every 2 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOn-State Voltage Drop\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1.0V DC maximum @ 0.5 A load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOff-State Thresholds\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e60V DC max \/ 1.0 mA max leakage current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eSignal Propagation Delay\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOFF-to-ON: ≤0.5 ms | ON-to-OFF: ≤1.0 ms @ 25 °C (≤2.0 ms @ 55 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eSystem Dielectric Isolation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100% factory tested @ 1900V DC for 1 s (Field-to-Backplane); No channel-to-channel isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eFlexbus Backplane Draw\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e80 mA maximum @ 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eExternal DC Power Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e13 mA @ 30V DC \/ 21 mA @ 48V DC \/ 27 mA @ 60V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePower \u0026amp; Thermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e3.7 W max @ 60V DC | 12.6 BTU\/hr max @ 60V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCompatible Terminal Bases\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eBase Keyswitch Position\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePosition 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eRecommended Branch Fusing\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2.0 A, 150V AC MQ2 normal-blow fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eEnvironmental Ratings\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOperating: 0 to 55 °C (32 to 131 °F) | Vibration: 5g @ 10…500 Hz | Shock: 30g peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePhysical Dimensions \u0026amp; Weight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) | Approx. 110 g (0.24 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eTarget Equipment \u0026amp; Field Integration Scenarios\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 48V DC sourcing configuration of the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OC16\u003c\/b\u003e\u003c\/span\u003e serves industrial applications where 48V control buses are preferred to reduce line losses over extended cable lengths:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTelecommunications control systems and DC power backup automation panels operating on 48V DC buses\u003c\/li\u003e\n\u003cli\u003eDirect driving of 48V DC solenoid valves, pneumatic manifolds, and directional hydraulic coils\u003c\/li\u003e\n\u003cli\u003eInterfacing with high-voltage DC relays and heavy-duty contactor coils in utility sub-panels\u003c\/li\u003e\n\u003cli\u003eActuating 48V industrial warning beacons, horns, and stack light indicators across large facilities\u003c\/li\u003e\n\u003cli\u003eSourcing current to automated sorting line gates and high-speed material handling actuators\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Visuals \u0026amp; Channel Sourcing Protection\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eBuilt-in logic indicators and transient protection ensure reliable field control and rapid diagnostic troubleshooting:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eField-Side Status LEDs:\u003c\/b\u003e Sixteen logic-driven yellow LEDs located on the front panel illuminate directly when corresponding output logic gates are active.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Surge Capacity:\u003c\/b\u003e Every output channel tolerates a 4.0 A surge for up to 10 ms, allowing direct switching of inductive loads with high initial inrush current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptically Isolated Backplane:\u003c\/b\u003e Field-side power rails are galvanically separated from the internal Flexbus logic network up to 1900V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Express Logistics \u0026amp; Warranty Terms\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eItem Condition:\u003c\/b\u003e Factory Sealed, Brand New Original Stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Coverage:\u003c\/b\u003e Backed by a 12 Months Replacement Guarantee\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrder Processing:\u003c\/b\u003e Dispatches within 24–48 hours upon order verification\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Express Carriers:\u003c\/b\u003e Direct door-to-door transit via FedEx, UPS, or DHL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OC16\u003c\/b\u003e\u003c\/span\u003e is a current-sourcing module, meaning it connects the positive +48V DC side of the supply to the output terminal when activated; field loads must have their opposite lead connected to the DC common rail. Because all 16 channels share a single internal DC power rail without channel-to-channel isolation, an accidental short on one output line can blow the main branch fuse or trip the power supply, affecting adjacent channels. When wiring inductive loads such as 48V solenoids or large relay coils, always install external flyback diodes across field load terminals. This suppresses back-EMF voltage spikes upon coil de-energization, protecting internal solid-state output transistors from over-voltage degradation and extending module service life.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What field wiring behavior occurs if a current-sinking sensor or load is wired to an output channel on this module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Sourcing output channels supply positive voltage (+48V DC) out to the field; connecting a current-sinking output to another sourcing circuit will create a direct short circuit or prevent the load from energizing until wired to the DC negative return line.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Does operating the module at elevated temperatures affect the maximum allowable DC voltage input?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Yes; the module accepts up to 60V DC maximum at ambient temperatures up to 45 °C, but the maximum allowable supply voltage drops to 55V DC when operating in environments between 45 °C and 55 °C to prevent internal thermal overload.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How can branch current protection be implemented on individual field lines for this sourcing output card?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Install inline 2.0 A, 150V AC MQ2 normal-blow fuses on field supply lines or use a fused base assembly to prevent high short-circuit currents from damaging the 500 mA output transistors.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why is there an OFF-to-ON response time advantage on this DC module compared to AC output cards?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Solid-state DC output transistors switch almost instantaneously (≤0.5 ms delay) because they do not have to wait for an AC sine wave zero-crossing event, making this card ideal for high-speed automated packaging lines.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Selection Guide: How do I choose between specifying the 1794-OC16 sourcing module and a 24V DC module like the 1794-OB16?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Select the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OC16\u003c\/b\u003e\u003c\/span\u003e when field control actuators and power buses operate on 48V DC nominal voltage (30…60V DC range). Select the 1794-OB16 when field solenoids and control circuits operate on standard 24V DC nominal power (10…31.2V DC range).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OC16.png?v=1784618132\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013908521142,"sku":"1794-OC16","price":158.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OC16_9e1a4acc-1ec9-428f-b338-5ef65273281f.jpg?v=1784618147"},{"product_id":"1794-im16-allen-bradley-flex-i-o-240v-ac-digital-input-module","title":"1794-IM16 Allen-Bradley Flex I\/O 240V AC Digital Input Module","description":"\u003ch2\u003e\u003cb\u003e1794-IM16 High-Voltage AC Input Interface\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM16\u003c\/b\u003e\u003c\/span\u003e is a high-density, 16-channel digital AC input interface belonging to the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley Flex I\/O Series\u003c\/b\u003e\u003c\/span\u003e engineered by Rockwell Automation. Designed specifically for direct monitoring of 240V AC line-voltage field devices, this module accommodates a nominal operating input range of 159 to 264V AC (47…63 Hz). It utilizes a non-isolated architecture across individual channels with 250V continuous basic insulation between field circuits and the backplane logic (type tested at 1530V AC for 60 seconds). With a nominal input impedance of 22.2 kΩ and an 11 mA input current draw at 240V AC, the unit draws only 32 mA at 5V DC from the Flexbus backplane. The module snaps into 1794-TBN and 1794-TBNK terminal base units set to Keyswitch Position 8, dissipating a maximum of 6 W power (20.47 BTU\/hr thermal output) at 264V AC.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications Breakdown\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwell Automation \/ \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCatalog Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM16\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eProduct Line\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eFlex I\/O Series\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eModule Function\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDigital AC Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eInput Density\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e16 Non-Isolated Inputs (Single Group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Input Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e240V AC (Operating Envelope: 159…264V AC, 47…63 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOn-State Voltage Threshold\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e159V AC min \/ 240V AC nom \/ 264V AC max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOn-State Current Draw\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e5.30 mA min @ 159V AC \/ 13.29 mA max @ 264V AC (11 mA nom @ 240V AC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOff-State Thresholds\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e40V AC max \/ 2.6 mA max off-state leakage current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Input Impedance\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e22.2 kΩ @ 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eField-to-Backplane Isolation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e250V continuous (Basic Insulation); Type tested @ 1530V AC for 60 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eChannel-to-Channel Isolation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eNone (Shared internal AC common line across all 16 channels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eFlexbus Power Consumption\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e32 mA @ 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePower \u0026amp; Thermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e6 W max @ 264V AC | 20.47 BTU\/hr max @ 264V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eRecommended Terminal Bases\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1794-TBN, 1794-TBNK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eTerminal Base Keyswitch Position\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePosition 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eAmbient Operating Temperature\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0 to 55 °C (32 to 131 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePhysical Dimensions \u0026amp; Weight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e94 x 94 x 91 mm (3.7 x 3.7 x 3.6 in.) | 141 g (4.97 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eTarget Equipment \u0026amp; Field Integration Scenarios\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe high AC voltage threshold of the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM16\u003c\/b\u003e\u003c\/span\u003e eliminates the need for external step-down control transformers or interposing relay contacts when monitoring 220V\/240V machinery lines:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect status monitoring of 230V AC motor starter auxiliary contacts (NO\/NC state feedback)\u003c\/li\u003e\n\u003cli\u003eInterfacing with high-voltage HVAC pressure switches, limit switches, and safety thermostats\u003c\/li\u003e\n\u003cli\u003eReading field positions from 240V AC motorized valve actuators in utility systems\u003c\/li\u003e\n\u003cli\u003eMonitoring power distribution status and main circuit breaker auxiliary trip indication lines\u003c\/li\u003e\n\u003cli\u003eProcessing discrete signals from industrial oven control panels operating on single-phase 240V feeds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Visuals \u0026amp; Channel Isolation Logic\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eFront-panel diagnostics combined with internal line protection ensure straightforward control cabinet setup:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eChannel Visual Status LED Array:\u003c\/b\u003e Sixteen individual yellow status LEDs located on the field side illuminate when field input signals exceed the 159V AC ON-state threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBackplane Optical Isolation:\u003c\/b\u003e Optocouplers provide 250V continuous basic insulation protecting the sensitive Flexbus backplane electronics from field-side voltage transients up to 1530V AC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCommon Neutral Bus Design:\u003c\/b\u003e All 16 channels share an internal AC common connection, optimizing wiring density on 1794-TBN NEMA-style terminal bases.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Fast Delivery \u0026amp; Guarantee\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCondition:\u003c\/b\u003e Brand New, Original Factory Sealed Unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Terms:\u003c\/b\u003e Covered by a 12 Months Replacement Warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrder Processing:\u003c\/b\u003e Dispatches within 24–48 hours from order confirmation\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Express Logistics:\u003c\/b\u003e Direct international express transit via FedEx, UPS, or DHL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM16\u003c\/b\u003e\u003c\/span\u003e is a robust solution for retrofitting legacy European or high-voltage utility control panels that utilize 220V–240V AC control logic. Because all 16 channels share a non-isolated common return bus inside the terminal base, all monitored input devices must be powered from the same AC phase leg or control transformer. Connecting signals from different phase legs (e.g., L1 and L2 of a 3-phase system) across channels on a single module will cause an immediate phase-to-phase short circuit across the internal common rail. If your installation requires monitoring inputs fed from multiple independent power transformers, opt for isolated input modules like the 1794-IA8I instead.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What field voltage condition causes the channel status LED to turn off on this 240V AC input module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e The input circuitry guarantees an OFF state when the field voltage drops below 40V AC or when the leakage current drops under 2.6 mA; any signal between 40V AC and 159V AC falls into an indeterminate switching zone and must be avoided.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can field input lines powered from two different 240V AC control transformers be wired to channels on the same base?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e No; because all 16 channels are non-isolated and share a single internal common line inside the module, all field devices connected to the base must derive their 240V AC power from the exact same control transformer source.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What terminal base units are recommended for installing this 16-point 240V AC input module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Rockwell Automation recommends using the 1794-TBN or 1794-TBNK terminal base units, which provide NEMA-style screw terminals designed specifically to accommodate high-voltage AC field wiring safely.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why does a long field cable run cause a input channel to register a false ON state even when the field contact is open?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e High-voltage AC signal wires running in parallel over long distances suffer from capacitive cable coupling, which can induce voltages above the 40V AC OFF-state threshold; installing parallel loading resistors (bleeder resistors) at the input terminals dissipates induced voltages.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Selection Guide: How do I determine whether to specify the 1794-IM16 or the 1794-IA16 for a project?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Select the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM16\u003c\/b\u003e\u003c\/span\u003e when field control devices operate on nominal 220V–240V AC control power (159…264V AC range). Select the 1794-IA16 when field signals operate on standard 120V AC control power (74…132V AC range).\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013909012662,"sku":"1794-IM16","price":163.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IM16.jpg?v=1784617608"},{"product_id":"1794-ia8-allen-bradley-flex-i-o-120vac-input-module","title":"1794-IA8 Allen-Bradley Flex I\/O 120VAC Input Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eGlobal PLC Spare HUB Review: Global PLC Spare HUB delivers specialized industrial automation parts built for robust plant-floor environments. The \u003cb style=\"color: #0056b3;\"\u003e1794-IA8\u003c\/b\u003e operates within the \u003cb style=\"color: #0056b3;\"\u003eFlex I\/O\u003c\/b\u003e architecture designed by \u003cb style=\"color: #0056b3;\"\u003eRockwell Automation\u003c\/b\u003e. Controls engineers integrate this 8-channel alternating current digital input module to interface standard 120VAC field signals directly with distributed processor racks.\u003c\/p\u003e\n\u003ch3\u003eTechnical Parameters \u0026amp; Architecture\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb style=\"color: #0056b3;\"\u003e1794-IA8\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series \u0026amp; Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb style=\"color: #0056b3;\"\u003eFlex I\/O\u003c\/b\u003e 8-Channel 120VAC Digital Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 non-isolated inputs grouped into a single common terminal bank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85 to 132VAC at 47 to 63 Hertz nominal frequency spectrum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitching Thresholds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e65VAC minimum ON-state voltage; 43VAC maximum OFF-state voltage limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Current Characteristics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12mA nominal current draw at 120VAC, 60Hz source\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfigurable Filter Times\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSelectable from 8.4ms up to 40ms (OFF-to-ON) and 26.4ms up to 58ms (ON-to-OFF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower \u0026amp; Thermal Profile\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaximum 4.5W power loss; maximum 15.3 BTU\/hr thermal dissipation at 132VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental Compliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOperational temperature range from 0 to 55°C with 5% to 95% non-condensing humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Blueprint\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module securely onto standard industrial DIN rails or direct backplane panels.\u003c\/li\u003e\n\u003cli\u003eAlign keyswitch position 8 correctly before seating the unit onto compatible terminal bases such as 1794-TB3, 1794-TB3S, 1794-TBN, or 1794-TB2.\u003c\/li\u003e\n\u003cli\u003eTerminate incoming field wires ranging from 22 to 12 AWG stranded copper directly into the base terminals.\u003c\/li\u003e\n\u003cli\u003eLink the local adapter node to ControlNet, DeviceNet, Profibus DP, or EtherNet\/IP distributed networks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommissioning and Maintenance Convenience\u003c\/h3\u003e\n\u003cp\u003eFront-panel yellow status indicators provide immediate visual feedback for each of the 8 individual customer-driven input lines. Default input filter times safeguard the processor from line transients, while hot-insertion capabilities on compatible terminal bases allow swift module swaps without powering down the entire cabinet rack.\u003c\/p\u003e\n\u003ch3\u003eCompatibility Framework\u003c\/h3\u003e\n\u003cp\u003eThe unit mates cleanly with 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, and variant terminal bases. It communicates smoothly across standard Flex I\/O adapter interfaces without requiring custom backplane firmware adjustments.\u003c\/p\u003e\n\u003ch3\u003eCertification Information\u003c\/h3\u003e\n\u003cp\u003eEngineered for industrial safety standards, the assembly meets stringent open-style IP20 guidelines and undergoes 100% isolation testing at 2150VDC for one second between field user connections and system logic.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents and Warranty\u003c\/h3\u003e\n\u003cp\u003eEach shipment contains one factory-tested \u003cb style=\"color: #0056b3;\"\u003e1794-IA8\u003c\/b\u003e input module. Global PLC Spare HUB supports your project integrity with a dependable 12-month operational warranty.\u003c\/p\u003e\n\u003ch3\u003eLogistics and Delivery\u003c\/h3\u003e\n\u003cp\u003eGlobal PLC Spare HUB processes and dispatches all orders within 24 to 48 hours. Expedited worldwide shipping is supported securely through reliable courier networks including FedEx, UPS, and DHL.\u003c\/p\u003e\n\u003ch3\u003eTypical Application Scenarios and Diagnostic Capability\u003c\/h3\u003e\n\u003cp\u003eIndustrial facilities deploy the \u003cb style=\"color: #0056b3;\"\u003e1794-IA8\u003c\/b\u003e within power generation plants, heavy manufacturing control panels, and municipal water treatment systems where legacy 120VAC control signals are prevalent. Onboard diagnostic capabilities use status LEDs and software-selectable filtering to isolate bouncing relay contacts, sagging line voltages, and intermittent field wiring faults rapidly.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do my AC input channels flicker when heavy plant motors start up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVoltage sags or inductive spikes from large motor starters can introduce line noise; increase the software input filter setting from the default 8.4ms up to higher timing thresholds to smooth out transient toggles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix 24VDC sensors and 120VAC limit switches on this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The \u003cb style=\"color: #0056b3;\"\u003e1794-IA8\u003c\/b\u003e is strictly engineered for 120VAC nominal circuits and requires an 85 to 132VAC operating voltage range to function properly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat precautions should I take when wiring non-isolated input groups?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSince all 8 channels share a common return path, ensure that all connected field devices originate from the same AC power source phase to prevent cross-circuit shorting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I verify if a faulty channel is caused by field wiring or internal hardware?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMeasure the AC voltage directly across the terminal base screw while the switch is closed; if the reading exceeds 65VAC but the yellow status LED remains unlit, the module channel may require replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat factors should guide my selection when matching base units for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvaluate your cabinet wiring density and screw versus spring-clamp preferences, ensuring you choose a compatible base like the 1794-TB3 or 1794-TB3S that matches your keyswitch position 8 requirement.\u003c\/p\u003e\n\u003ch3\u003eBuying Guide\u003c\/h3\u003e\n\u003cp\u003eWhen upgrading legacy control architectures, verify your system voltage requirements, network adapter type, and physical panel dimensions. Procuring exact factory part numbers like the \u003cb style=\"color: #0056b3;\"\u003e1794-IA8\u003c\/b\u003e guarantees absolute hardware compatibility and protects your distributed control investment against premature downtime.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IA8_2.png?v=1784617445\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013909536950,"sku":"1794-IA8","price":141.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IA8_0773aac1-374e-4ad7-917e-8b1eba258efc.jpg?v=1784617431"},{"product_id":"allen-bradley-1794-oe12-flex-i-o-12-channel-analog-output-module","title":"Allen-Bradley 1794-OE12 Flex I\/O 12-Channel Analog Output Module","description":"\u003ch3\u003e\u003cstrong\u003eEngineering Overview \u0026amp; System Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OE12\u003c\/strong\u003e\u003c\/span\u003e is a high-density analog output module designed by \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eRockwell Automation\u003c\/strong\u003e\u003c\/span\u003e for the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eFlex I\/O Series\u003c\/strong\u003e\u003c\/span\u003e. Engineered to bridge digital controllers with precision field instrumentation, this module provides twelve single-ended, non-isolated output channels capable of driving both voltage and current control signals across demanding industrial processes.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications \u0026amp; Operational Matrix\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth\u003e\u003cstrong\u003eCore Parameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eEngineering Metric \u0026amp; Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer \/ Brand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eRockwell Automation \/ Allen-Bradley\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCatalog Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OE12\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eFlex I\/O High-Density Analog Output Module\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 Single-ended, non-isolated channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfigurable Signal Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to 20 mA, 4 to 20 mA, and ±10V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital-to-Analog Conversion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16-bit resolution in 2's complement, left-justified format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConversion Resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVoltage: 320 μV\/cnt | Current: 0.641 μA\/cnt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Load Limits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent Load: 0 to 750 Ω @ 24V DC | Voltage Load: 3 mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAbsolute Accuracy \u0026amp; Drift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1% Full Scale @ 25°C; Drift: 0.004% Full Scale\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower \u0026amp; Thermal Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMax 7.68W @ 24V DC power dissipation; 26.2 BTU\/hr thermal dissipation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlexBus Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 mA @ 5V DC backplane power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhysical Enclosure Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e94.0 mm x 94.0 x 53.3 mm (3.7 in x 3.7 in x 2.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eEnvironmental Operating Parameters\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eThermal Thresholds:\u003c\/strong\u003e\u003c\/span\u003e Operational temperature range of -20°C to 60°C (-4°F to 140°F); storage range from -40°C to 85°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHumidity Parameters:\u003c\/strong\u003e\u003c\/span\u003e 5% to 95% non-condensing relative humidity tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eShock \u0026amp; Vibration Limits:\u003c\/strong\u003e\u003c\/span\u003e Tested to 30g operating shock (50g non-operating) and 5g vibration across 10 to 500 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eIsolation Voltage:\u003c\/strong\u003e\u003c\/span\u003e 50V continuous basic insulation rating, tested at 850V DC for 60 seconds between user power and system backplane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eControlLogix \u0026amp; CompactLogix PACs:\u003c\/strong\u003e Acts as a distributed analog output node via compatible Flex I\/O network adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModular Terminal Bases:\u003c\/strong\u003e Requires physical installation on specialized terminal bases with keyswitch position 4, specifically \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-TB3G\u003c\/strong\u003e\u003c\/span\u003e or \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-TB3GS\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Actuators \u0026amp; Valves:\u003c\/strong\u003e Directly interfaces with electro-hydraulic positioning valves, variable frequency drives, and chart recorders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Vendor Network Adapters:\u003c\/strong\u003e Compatible with communication adapter nodes including EtherNet\/IP, ControlNet, and Profibus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIndustrial Control Applications \u0026amp; Diagnostic Capabilities\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OE12\u003c\/strong\u003e\u003c\/span\u003e delivers high-precision analog control loops across complex continuous process automation environments:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eProcess Flow \u0026amp; Pressure Modulation:\u003c\/strong\u003e\u003c\/span\u003e Sends precise 4-20mA signals to control loop valves and chemical injection metering pumps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eSpeed Reference Generation:\u003c\/strong\u003e\u003c\/span\u003e Outputs ±10V DC commands to regulate industrial motor drive speeds and winding tensioners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eBuilt-in Group Diagnostics:\u003c\/strong\u003e\u003c\/span\u003e Integrated green\/red power and status status indicators provide real-time hardware health checks and loop status monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eZero Calibration Maintenance:\u003c\/strong\u003e\u003c\/span\u003e Features factory-calibrated circuitry that eliminates manual potentiometer adjustments during routine servicing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFrom a systems integration standpoint, deploying the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OE12\u003c\/strong\u003e\u003c\/span\u003e requires careful consideration of power budgeting and terminal base selection. Unlike standard digital cards, this high-density module draws up to 320 mA from the external 24V DC supply under full load and requires grounded shield termination via \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-TB3G\u003c\/strong\u003e\u003c\/span\u003e or \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-TB3GS\u003c\/strong\u003e\u003c\/span\u003e bases to suppress electromagnetic interference (EMI) in noisy plant environments. Note that channels default to 0 mA until configuration parameters are fully written by the master controller.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics, Fulfillment \u0026amp; Quality Guarantee\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition Status:\u003c\/strong\u003e 100% Brand New and Original Factory Sealed Inventory.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch Lead Time:\u003c\/strong\u003e Guaranteed order processing and dispatch within 24 to 48 hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Express Logistics:\u003c\/strong\u003e Secure worldwide air transit delivered via FedEx, UPS, or DHL with end-to-end tracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Assurance:\u003c\/strong\u003e Fully protected by a comprehensive 12-Month Factory Defect Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Why do the output channels default to 0 mA upon initial module power-up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OE12\u003c\/strong\u003e\u003c\/span\u003e is designed with a safety default state that holds outputs at 0 mA until the host controller successfully downloads and executes the user-defined configuration profile.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Can I mix voltage and current output signal types across the twelve available channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Each channel can be independently software-configured for either 0-20mA, 4-20mA current outputs, or ±10V DC voltage outputs through your programming software.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What makes the 1794-TB3G and 1794-TB3GS terminal bases mandatory for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: These specific terminal bases incorporate dedicated grounding terminals and circuitry designed to handle analog signal shielding, preventing ground loops and electrical noise interference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: How do I handle calibration during routine plant maintenance cycles?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The module utilizes factory-calibrated digital-to-analog converters with an absolute accuracy of 0.1%, eliminating the need for physical calibration procedures or manual hardware trimming.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: What guidance should I follow when wiring loads to the voltage output channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Ensure that the external impedance or current load connected to any voltage output channel does not exceed the maximum specified limit of 3 mA to prevent output saturation or thermal fault trips.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013909733558,"sku":"1794-OE12","price":166.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OE12_fa63c584-f5ed-4f65-a0cb-42a1e4ec84ff.jpg?v=1784617310"},{"product_id":"1794-oa8i-allen-bradley-flex-i-o-8-channel-isolated-ac-module","title":"1794-OA8I Allen Bradley Flex I\/O 8 Channel Isolated AC Module","description":"\u003ch2\u003e\u003cb\u003e1794-OA8I Solid-State AC Output Architecture\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OA8I\u003c\/b\u003e\u003c\/span\u003e is an 8-channel solid-state isolated AC digital output module in the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley Flex I\/O Series\u003c\/b\u003e\u003c\/span\u003e manufactured by Rockwell Automation. Designed for switching 120V AC field loads, this module provides channel-to-channel and channel-to-backplane galvanic isolation rated at 120V continuous (1250V AC dielectric withstand for 60 seconds). It supports up to 500 mA output current per channel, yielding a total module capacity of 4.0 A. Operating across an ambient temperature envelope of -20 to 55 °C, the module interface snaps onto compatible terminal bases including 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, and 1794-TBNF, requiring Keyswitch Position 8. Power dissipation ranges from 4.1W at 0.5A up to 6.3W at 1.0A maximum load, with 80 mA backplane current draw at 5V DC via the Flexbus network.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications Summary\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwell Automation \/ \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCatalog Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OA8I\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eProduct Series\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eFlex I\/O Series\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eModule Type\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eIsolated AC Digital Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOutput Channels\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8 Individually Isolated Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Output Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e120V AC (Operating range 85…132V AC, 47…63 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCurrent Rating\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e500 mA max per channel \/ 4.0 A total module aggregate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eMinimum On-State Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e5.0 mA per output channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOn-State Voltage Drop\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1.0V AC max @ 0.5A load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOff-State Leakage Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2.25 mA max @ 120V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eGalvanic Isolation Rating\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e120V continuous (channel-to-channel \u0026amp; channel-to-backplane); 1250V AC for 60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eFlexbus Power Draw\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e80 mA @ 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eThermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e14.0 BTU\/hr @ 0.5A load (Max 21.5 BTU\/hr @ 1.0A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCompatible Terminal Bases\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eBase Keyswitch Position\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePosition 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eRecommended Overcurrent Protection\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1.6 A, 250V AC slow-blow field fuses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOperating Temperature Range\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-20 to 55 °C (-4 to 131 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePhysical Dimensions\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eTarget Equipment \u0026amp; Field Integration Scenarios\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe solid-state design and individual channel isolation of the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OA8I\u003c\/b\u003e\u003c\/span\u003e suit high-duty AC switching applications across diverse industrial control enclosures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e120V AC solenoid valve actuation in pneumatic transport and water treatment systems\u003c\/li\u003e\n\u003cli\u003eInterfacing with magnetic contactor coils and motor starters without interposing relays\u003c\/li\u003e\n\u003cli\u003eDrive run\/stop and direction control signals operating on distinct AC power feeds\u003c\/li\u003e\n\u003cli\u003eMachine visual alarm columns, horns, and stack light indicators requiring fast cycle rates\u003c\/li\u003e\n\u003cli\u003eProcess control loops demanding isolated field wiring to isolate phase-to-phase AC circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Features \u0026amp; Electrical Protection\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eReal-time visual feedback and electrical isolation maintain operational uptime and assist troubleshooting:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eStatus LED Array:\u003c\/b\u003e Eight yellow field-side status LEDs illuminate when the corresponding output circuit receives active gate trigger signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eChannel-to-Channel Isolation:\u003c\/b\u003e Individual channel commons prevent cross-phase short circuits when switching loads fed from different AC transformers or phase legs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid-State Switching:\u003c\/b\u003e Triac-based solid-state outputs eliminate contact bounce and mechanical contact wear during high-frequency pulse operations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Fast Delivery \u0026amp; Guarantee\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Condition:\u003c\/b\u003e 100% Original, Factory Sealed Stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Terms:\u003c\/b\u003e Full 12 Months Replacement Warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDispatch Window:\u003c\/b\u003e Same-day or next-business-day processing\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Freight Options:\u003c\/b\u003e Express air shipping via FedEx, UPS, or DHL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OA8I\u003c\/b\u003e\u003c\/span\u003e is an ideal solid-state alternative to relay output modules when rapid switching speeds or high duty cycles would prematurely wear out mechanical contacts. However, engineers must account for two triac characteristics during design: off-state leakage current and minimum on-state holding current. The 2.25 mA maximum leakage current can keep low-power loads—such as high-impedance digital inputs or high-efficiency LED indicators—partially energized when the channel is OFF. Conversely, field loads drawing under 5 mA will fail to latch the triac ON. Installing a parallel load resistor (bleeder resistor) across sensitive low-power field devices stabilizes both states and prevents ghost-voltage trips.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: Why does a field load connected to the module stay energized or flicker when the channel status LED is turned OFF?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Triac solid-state switches exhibit up to 2.25 mA off-state leakage current; on low-power loads like high-efficiency relays or LED indicators, this small leakage current is sufficient to maintain excitation, requiring an parallel AC load resistor to bleed off the residual voltage.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How does wiring the terminal base differ for channel-isolated AC modules compared to non-isolated variants?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Each isolated channel requires its own 120V AC hot leg connected to the designated odd terminal and its output load connected to the adjacent even terminal, ensuring zero common power bus connections across the 8 channels inside the base.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What branch protection fuse size should be installed on the field power lines for this module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Install 1.6 A, 250V AC slow-blow fuses on field supply lines (or utilize a 1794-TBNF fused terminal base) to protect output circuits from thermal damage caused by load short circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can this module switch 24V DC loads or low-voltage DC signals?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e No; triac output switches rely on the zero-crossing nature of alternating current (47…63 Hz) to turn off properly. Applying direct current (DC) will cause the output to lock in an permanently ON state once triggered.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Selection Guide: When should I specify the 1794-OA8I solid-state module instead of the 1794-OW8 electromechanical relay module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Choose the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OA8I\u003c\/b\u003e\u003c\/span\u003e for high-frequency switching operations on 120V AC loads where solid-state longevity is needed. Select the 1794-OW8 when switching DC voltages, dry contacts, or loads drawing less than 5 mA on-state current.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OA8I.png?v=1784617208\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013911109814,"sku":"1794-OA8I","price":137.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OA8I_810b7162-4af3-4e0b-bf02-e6edb29bda9c.jpg?v=1784617223"},{"product_id":"1794-ow8xt-rockwell-automation-isolated-relay-output-flex-i-o","title":"1794-OW8XT Rockwell Automation Isolated Relay Output FLEX I\/O","description":"\n    \u003ch2 style=\"font-size: 1.8em; color: #cd3d3d; margin: 0; text-transform: uppercase;\"\u003e1794-OW8XT | FLEX I\/O XT Isolated Relay Output Module\u003c\/h2\u003e\n    \u003cp style=\"font-size: 1.1em; color: #555; margin-top: 5px;\"\u003eIndustrial-Grade 8-Channel N.O. Relay Solution for Extended Environments\u003c\/p\u003e\n  \n\n  \u003carticle\u003e\n    \u003ch3 style=\"background: #333; color: #fff; padding: 10px 15px; font-size: 1.1em;\"\u003eCritical Engineering Parameters\u003c\/h3\u003e\n    \u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 15px; font-size: 0.95em;\"\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9; width: 30%;\"\u003eCatalog Number\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px; font-weight: bold; color: #cd3d3d;\"\u003e1794-OW8XT\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9;\"\u003eOutput Configuration\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px;\"\u003e8 Individually Isolated, Normally Open (N.O.) Relays\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9;\"\u003eVoltage Rating\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px;\"\u003e24V DC Nominal (19.2 - 31.2V DC Range)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9;\"\u003eContact Voltage\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px;\"\u003eUp to 250V AC \/ 125V DC Switching Capacity\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9;\"\u003eIsolation Voltage\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px;\"\u003e250V Continuous (Basic Insulation Type)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9;\"\u003eSwitching Frequency\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px;\"\u003e0.3 Hz Max (1 operation per 3 seconds at rated load)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n        \u003cth style=\"text-align: left; padding: 12px; background: #f9f9f9;\"\u003eSpecial Protection\u003c\/th\u003e\n        \u003ctd style=\"padding: 12px;\"\u003eConformal Coated (XT Series) for Harsh Environments\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/article\u003e\n\n  \u003carticle style=\"margin-top: 35px; background: #fdfdfd; border: 1px dashed #ccc; padding: 20px;\"\u003e\n    \u003ch3 style=\"margin-top: 0; color: #333; border-bottom: 2px solid #cd3d3d; display: inline-block;\"\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n    \u003cp style=\"font-style: italic; color: #444; margin-top: 15px;\"\u003e\n      \"The 'XT' suffix in 1794-OW8XT signifies Extended Temperature and Conformal Coating. In our field audits, we consistently see this module outperform standard relay cards in high-humidity or corrosive atmosphere applications (like wastewater or oil\/gas skids). Unlike standard solid-state outputs, the electromagnetic relays in the 1794-OW8XT handle high-voltage AC loads with zero leakage current, crucial for preventing 'ghost' activation of downstream solenoids.\"\n    \u003c\/p\u003e\n    \u003ch4 style=\"margin-bottom: 8px;\"\u003eField Diagnostics \u0026amp; Application:\u003c\/h4\u003e\n    \u003cul style=\"padding-left: 20px; color: #444;\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eXT Resilience:\u003c\/strong\u003e Best suited for non-climate-controlled remote I\/O cabinets where temperatures fluctuate significantly.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDiagnostic Tip:\u003c\/strong\u003e Monitor the 1.2ms bounce time; if your logic requires micro-second synchronization, consider an interposing solid-state relay.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMounting Guide:\u003c\/strong\u003e Must be grounded via zinc-plated yellow-chromate steel DIN rail to ensure EMC compliance and reduce electrical noise interference.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/article\u003e\n\n  \u003carticle style=\"margin-top: 35px;\"\u003e\n    \u003ch3 style=\"background: #333; color: #fff; padding: 10px 15px; font-size: 1.1em;\"\u003eCommercial Logistics \u0026amp; Service\u003c\/h3\u003e\n    \u003cp style=\"padding-left: 15px;\"\u003e\n      \u003cstrong\u003eWarranty:\u003c\/strong\u003e 12-Month Comprehensive Replacement Guarantee.\u003cbr\u003e\n      \u003cstrong\u003eGlobal Shipping:\u003c\/strong\u003e Priority Express via \u003cstrong\u003eFedEx, UPS, and DHL\u003c\/strong\u003e.\u003cbr\u003e\n      \u003cstrong\u003eQuality Assurance:\u003c\/strong\u003e 100% Original Rockwell Automation Surplus or New, rigorously tested prior to dispatch.\n    \u003c\/p\u003e\n  \u003c\/article\u003e\n\n  \u003carticle style=\"margin-top: 30px; border-top: 2px solid #eee; padding-top: 20px;\"\u003e\n    \u003ch3 style=\"text-align: center; color: #cd3d3d;\"\u003eProfessional Engineering FAQ \u0026amp; Procurement Guide\u003c\/h3\u003e\n    \n    \u003cp style=\"font-weight: bold; margin-bottom: 0;\"\u003eQ1: What defines the specific advantage of the 1794-OW8XT version?\u003c\/p\u003e\n    \u003cp style=\"margin-top: 5px; padding-left: 15px; border-left: 3px solid #ccc;\"\u003eA1: The XT version features conformal coating on the internal circuitry and is rated for extreme temperatures. This makes the 1794-OW8XT essential for environments where condensation or airborne contaminants could cause premature failure in standard relay modules.\u003c\/p\u003e\n\n    \u003cp style=\"font-weight: bold; margin-bottom: 0;\"\u003eQ2: Why is external fusing mandatory for 1794-OW8XT output channels?\u003c\/p\u003e\n    \u003cp style=\"margin-top: 5px; padding-left: 15px; border-left: 3px solid #ccc;\"\u003eA2: Relay contacts are susceptible to welding in short-circuit conditions. Since the 1794-OW8XT manages up to 250V AC, an external 2A fuse per point is best practice to protect the internal relay from inductive flyback or overcurrent damage.\u003c\/p\u003e\n\n    \u003cp style=\"font-weight: bold; margin-bottom: 0;\"\u003eQ3: How do I select the correct terminal base for a 1794-OW8XT installation?\u003c\/p\u003e\n    \u003cp style=\"margin-top: 5px; padding-left: 15px; border-left: 3px solid #ccc;\"\u003eA3: It is compatible with 9 different terminal bases, including 1794-TB3 and -TBN. For high-voltage applications (up to 250V), we recommend the 1794-TBN or -TBNF to ensure proper spacing and mechanical fuse protection.\u003c\/p\u003e\n\n    \u003cp style=\"font-weight: bold; margin-bottom: 0;\"\u003eQ4: Does the 1.0mA leakage current through the snubber affect low-power loads?\u003c\/p\u003e\n    \u003cp style=\"margin-top: 5px; padding-left: 15px; border-left: 3px solid #ccc;\"\u003eA4: Yes, it can. The snubber circuit passes ~1.0mA for noise suppression. If you are driving ultra-low-power LEDs or high-impedance inputs, ensure this current won't keep the load 'ON' when the relay is in the 'OFF' state.\u003c\/p\u003e\n\n    \u003cp style=\"font-weight: bold; margin-bottom: 0;\"\u003eQ5: Is the 1794-OW8XT suitable for high-frequency switching tasks?\u003c\/p\u003e\n    \u003cp style=\"margin-top: 5px; padding-left: 15px; border-left: 3px solid #ccc;\"\u003eA5: Absolutely not. With a maximum switching frequency of 0.3Hz (one cycle every 3 seconds) at rated load, this module is designed for static state switching (pumps, fans, contactors). For PWM or fast pulses, select a solid-state output module.\u003c\/p\u003e\u003c\/article\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013911142582,"sku":"1794-OW8XT","price":176.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OW8XT_02139f8c-6619-4996-a414-db719de79e9e.jpg?v=1774945001"},{"product_id":"1794-of4i-analog-output-module-allen-bradley-flex-i-o-series","title":"1794-OF4I Analog Output Module Allen-Bradley Flex I\/O Series","description":"\u003ch3\u003eProduct Introduction\u003c\/h3\u003e\n\u003cp\u003eWelcome to Global PLC Spare HUB Review for the \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1794-OF4I\u003c\/strong\u003e \u003cstrong\u003eFlex I\/O Isolated Analog Output Module\u003c\/strong\u003e. This high-precision signal conversion unit delivers four isolated output channels for demanding industrial control networks. Designed specifically for the modular \u003cstrong\u003eFlex I\/O Series\u003c\/strong\u003e, this device provides configurable voltage and current signals to drive actuators, valves, and field instruments safely. Global PLC Spare HUB's Insight emphasizes that using fully isolated output channels prevents ground loops and protects control processors from catastrophic field-side electrical surges.\u003c\/p\u003e\n\u003ch3\u003eConfiguration Breakdown \u0026amp; Modular Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer \u0026amp; Brand:\u003c\/strong\u003e \u003cstrong\u003eRockwell Automation\u003c\/strong\u003e \/ \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Number \u0026amp; Series:\u003c\/strong\u003e \u003cstrong\u003e1794-OF4I\u003c\/strong\u003e \/ \u003cstrong\u003e\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1794-flex-i-o\"\u003eFlex I\/O\u003c\/a\u003e Series\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Classification:\u003c\/strong\u003e Flex I\/O Isolated Analog Output Module (Digital-to-Analog Converter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Configuration:\u003c\/strong\u003e Four (4) fully isolated output channels supporting user-configurable ranges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Terminal Bases:\u003c\/strong\u003e 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN units\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEngineering Parameter\u003c\/th\u003e\n\u003cth\u003eTechnical Performance Metric\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Signal Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20 mA, 0-20 mA, +\/-10 VDC, 0-10 VDC, +\/-5 VDC, 0-5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution \u0026amp; Conversion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 bits plus sign (0.320 mV\/cnt voltage, 0.656 mA\/cnt current)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUpdate Rate \u0026amp; Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 or 5.0 ms all channels; step response to 63% is less than 25 microseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExternal Power Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNominal 24 VDC (range: 19.2 to 31.2 VDC including 5 percent AC ripple)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBus Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 mA FlexBus current at 5 VDC nominal voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaximum 16 BTU per hour at 31.2 VDC operating limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv\u003eMount the \u003cstrong\u003e1794-OF4I\u003c\/strong\u003e securely onto a standard industrial DIN rail or directly to a backplate enclosure sub-panel.\u003c\/div\u003e\n\u003cdiv\u003eSnap the module firmly onto a compatible terminal base such as the 1794-TB3TS to establish proper FlexBus communication.\u003c\/div\u003e\n\u003cdiv\u003eConnect an external 24 VDC power source supplying between 19.2 and 31.2 VDC to the designated power terminals.\u003c\/div\u003e\n\u003cdiv\u003eEnsure field wiring uses properly shielded twisted-pair cables to maintain signal fidelity and minimize electromagnetic noise.\u003c\/div\u003e\n\u003ch3\u003eCommissioning and Maintenance Convenience\u003c\/h3\u003e\n\u003cdiv\u003eFactory calibration ensures precise 0.1 percent full-scale accuracy at 25 degrees Celsius right out of the box.\u003c\/div\u003e\n\u003cdiv\u003eConfigurable update rates allow automation engineers to balance loop response times against process stability requirements.\u003c\/div\u003e\n\u003cdiv\u003eModule diagnostics report open-load conditions and power supply anomalies instantly through the host controller software.\u003c\/div\u003e\n\u003ch3\u003eCompatibility \u0026amp; Integration\u003c\/h3\u003e\n\u003cdiv\u003eIntegrates seamlessly with any standard Flex I\/O communication adapter across disparate industrial networks.\u003c\/div\u003e\n\u003cdiv\u003eFully supported within Studio 5000 and RSLogix programming environments for straightforward tag configuration.\u003c\/div\u003e\n\u003ch3\u003eCertification Information\u003c\/h3\u003e\n\u003cdiv\u003eApproved for safe operation in hazardous industrial environments subject to local electrical classifications.\u003c\/div\u003e\n\u003cdiv\u003eBuilt to withstand harsh shock up to 30g and operational vibration up to 5g at 10 to 500 Hz.\u003c\/div\u003e\n\u003ch3\u003ePackage Contents \u0026amp; Warranty\u003c\/h3\u003e\n\u003cdiv\u003eOne \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1794-OF4I\u003c\/strong\u003e \u003cstrong\u003eFlex I\/O Isolated Analog Output Module\u003c\/strong\u003e unit.\u003c\/div\u003e\n\u003cdiv\u003eStandard protective hardware packaging and safety documentation inserts.\u003c\/div\u003e\n\u003cdiv\u003eBacked by a comprehensive \u003cstrong\u003e12-month warranty\u003c\/strong\u003e starting from the original purchase date.\u003c\/div\u003e\n\u003ch3\u003eShipping and Logistics\u003c\/h3\u003e\n\u003cdiv\u003eImmediate order dispatch within \u003cstrong\u003e24-48 hours\u003c\/strong\u003e for items currently stocked in our warehouse.\u003c\/div\u003e\n\u003cdiv\u003eReliable worldwide express courier delivery managed via \u003cstrong\u003eFedEx\u003c\/strong\u003e, \u003cstrong\u003eUPS\u003c\/strong\u003e, and \u003cstrong\u003eDHL\u003c\/strong\u003e.\u003c\/div\u003e\n\u003cdiv\u003eSecure anti-static packaging protects sensitive internal microprocessors during international transit.\u003c\/div\u003e\n\u003ch3\u003eTypical Applications and Diagnostic Capability\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eApplication 1:\u003c\/strong\u003e Controlling modulating control valves and variable speed drives in chemical processing plants.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eApplication 2:\u003c\/strong\u003e Transmitting precise analog setpoint signals to remote actuators across distributed manufacturing lines.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDiagnostic Capability:\u003c\/strong\u003e Identifies channel overload conditions, voltage sags, calibration drift, and communication timeouts before process downtime occurs.\u003c\/div\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do both voltage and current output terminals output zero until module configuration is complete?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module defaults to an unconfigured safe state with zero outputs to prevent erratic actuator movement during initial power-up sequences.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum continuous overload protection limit for individual channels on the 1794-OF4I?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach channel can safely withstand a maximum overload of 30 Volts continuous or 32 mA continuous for one channel at a time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does temperature variation affect the absolute accuracy of the voltage versus current terminals?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVoltage terminals drift by 0.0012 percent full scale per degree Celsius, while current terminals drift by 0.0025 percent full scale per degree Celsius.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat selection criteria should guide the choice between terminal bases like the 1794-TB3 and 1794-TBN?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSelect base units based on wiring density, spring-clamp versus screw-clamp preferences, and required continuous isolation voltage ratings (up to 250V for TBN).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow can maintenance personnel verify that the external power supply is operating within acceptable limits?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMeasure the DC voltage across the power terminals with a digital multimeter to confirm it stays strictly between 19.2 and 31.2 VDC including ripple.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013911535798,"sku":"1794-OF4I","price":168.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OF4I_51f7b026-2bd1-429f-ad5f-abae7a04d000.jpg?v=1784790090"},{"product_id":"1794-ow8-allen-bradley-flex-i-o-8-channel-isolated-relay-module","title":"1794-OW8 Allen Bradley Flex I\/O 8 Channel Isolated Relay Module","description":"\u003ch2\u003e\u003cb\u003e1794-OW8 Isolated Relay Output Architecture\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OW8\u003c\/b\u003e\u003c\/span\u003e is an 8-channel isolated electromechanical relay output module belonging to the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley Flex I\/O Series\u003c\/b\u003e\u003c\/span\u003e produced by Rockwell Automation. Built for switching mixed AC and DC power loads, this module contains 8 independent Form A (normally open) dry contacts with channel-to-channel galvanic isolation rated at 250V continuous. Operating on an external 24 Vdc supply (19.2 to 31.2 Vdc range at 125 mA), it draws a minimal 35 mA at 5 Vdc from the Flexbus backplane. The module snaps onto standard terminal base units including 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, and 1794-TBNF, utilizing a mechanical keying setting at Keyswitch Position 9. Internal RC snubber circuits across each relay contact protect switching elements from inductive voltage spikes, while eight yellow front-panel LEDs display real-time output coil status.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwell Automation \/ \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCatalog Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OW8\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eProduct Series\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eFlex I\/O Series\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eModule Type\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eIsolated Electromechanical Relay Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOutputs per Module\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8 Form A (Normally Open) Isolated Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eAC Contact Rating\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e250 Vac, 2 A resistive (50\/60 Hz); 120\/240 Vac (1800 VA Make, 180 VA Break)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eDC Contact Rating\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e5 to 30 Vdc, 2 A resistive; 125 Vdc @ 0.22 A resistive; Pilot Duty R150 (28 VA max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eMinimum Contact Load\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100 µA @ 100 mV DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eInitial Contact Resistance\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e30 mΩ nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eSwitching Frequency \/ Delay\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0.3 Hz max (1 op\/3 s); OFF-to-ON \/ ON-to-OFF delay = 10 ms max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eContact Life Expectancy\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100,000 electrical operations minimum @ rated load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOff-State Leakage Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1.0 mA max @ 240 Vac (through internal RC snubber circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eExternal DC Power Supply\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e24 Vdc nominal (19.2 to 31.2 Vdc, includes 5% ripple) @ 125 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eFlexbus Current Draw\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e35 mA @ 5 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePower \u0026amp; Thermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePower: 5.5 W max @ 31.2 Vdc | Thermal: 18.8 BTU\/hr max @ 31.2 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eIsolation Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e250V continuous (Basic Insulation) relay-to-relay, relay-to-backplane, relay-to-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCompatible Terminal Bases\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF, 1794-TB3K, 1794-TBNK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eKeyswitch Setting\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePosition 9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eRecommended Fusing\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e3.0 A, 250 Vac slow-blow fuses (Littelfuse part number 239003)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePhysical Dimensions\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) installed on base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eTarget Equipment \u0026amp; Application Scenarios\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OW8\u003c\/b\u003e\u003c\/span\u003e provides galvanically isolated relay contacts capable of routing intermixed AC and DC voltages on a single slot. Key target machinery and system integration scenarios include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePilot lights, stacks, and alarm annunciator panels operating across non-uniform voltage lines\u003c\/li\u003e\n\u003cli\u003eInterposition control for motor starter coil energization in MCC (Motor Control Center) buckets\u003c\/li\u003e\n\u003cli\u003eSolenoid valve control in hydraulic power units (HPU) and pneumatic manifolds\u003c\/li\u003e\n\u003cli\u003eInterfacing PLC outputs with third-party boiler control circuits or security interlock loops\u003c\/li\u003e\n\u003cli\u003eFractional horsepower AC\/DC actuators requiring complete dry-contact electrical separation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic \u0026amp; Monitoring Capabilities\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eIntegrated hardware indicators and contact protection circuits ensure high signal reliability during field operations:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eChannel Output Indicators:\u003c\/b\u003e Eight yellow status LEDs positioned along the front panel display the real-time drive status of each relay coil logic input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e250V Galvanic Channel Isolation:\u003c\/b\u003e Each relay contact set is electrically separated from adjacent contacts, backplane power, and user logic to prevent voltage cross-over.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBuilt-In RC Snubber Protection:\u003c\/b\u003e Internal snubber circuits wired across each contact tip absorb high-voltage inductive kickback spikes generated when switching solenoids or contactors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Fast Delivery \u0026amp; Warranty Terms\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Condition:\u003c\/b\u003e Brand New, Factory Sealed Packaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Coverage:\u003c\/b\u003e Full 12 Months Replacement Warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrder Handling:\u003c\/b\u003e Dispatches within 24–48 hours upon payment clearance\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Logistics Partners:\u003c\/b\u003e Express delivery worldwide via FedEx, UPS, or DHL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OW8\u003c\/b\u003e\u003c\/span\u003e is one of the most flexible modules in the Flex I\/O lineup due to its true dry-contact isolation, allowing engineers to switch 120V AC, 240V AC, and 24V DC from different power buses on the same physical module. However, pay close attention to external supply stability; always supply a clean, unswitched +24V DC line to the module's power terminals. Voltage dips on the 24V DC auxiliary supply can cause minor variations in coil energization timing, which may momentarily force a single contact to bear full inrush load during group switching operations. Additionally, when driving highly inductive loads, installing external MOV surge suppressors directly across field coils will preserve internal relay contacts beyond the 100,000-cycle minimum design threshold.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What field symptom indicates that the internal RC snubber circuit is interacting with a low-power AC load?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Low-current AC loads (such as high-impedance LED indicators or small relays) may stay partially energized or flicker when the contact opens due to the 1.0 mA max off-state leakage current passing through the snubber circuit; placing a parallel bleeder resistor across the load resolves this issue.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can a 24V DC load and a 230V AC load be wired simultaneously on adjacent channels of the same module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Yes. Each relay output is individually isolated with a 250V continuous basic insulation rating, allowing different supply voltages and power sources to be safely switched across different channels on the same module.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How can output short-circuit protection be added when wiring load circuits to the module base?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Mount the module on a 1794-TBNF fused terminal base unit, which incorporates fuse holders for 3.0 A, 250 Vac slow-blow fuses (Littelfuse 239003) directly in series with each relay output channel.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why is there a maximum switching frequency limit of 0.3 Hz (1 operation every 3 seconds) specified for rated loads?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Electromechanical relay contacts experience arc heating and mechanical bounce (1.2 ms mean bounce time) during state changes. Restricting full-load switching frequency to 0.3 Hz prevents thermal buildup on contact tips and preserves contact life.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Selection Guide: When should I choose the 1794-OW8 relay module instead of a solid-state DC output module like the 1794-OB16?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Select the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-OW8\u003c\/b\u003e\u003c\/span\u003e when your application requires dry-contact isolation, mixed AC\/DC switching on a single module, or zero-voltage-drop contacts. Choose solid-state modules like the 1794-OB16 for high-frequency switching applications where rapid cycling would wear out mechanical contacts.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OW8.png?v=1784617107\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013913108662,"sku":"1794-OW8","price":183.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OW8_682db23d-57e3-4f2c-a7a1-96a41fb96d1d.jpg?v=1784617121"},{"product_id":"1794-ib16-rockwell-automation-16-channel-dc-input-unit","title":"1794-IB16 Rockwell Automation 16-Channel DC Input Unit","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eGlobal PLC Spare HUB's Insight: Global PLC Spare HUB supplies robust industrial automation components engineered for distributed control architectures. The \u003cb style=\"color: #0056b3;\"\u003e1794-IB16\u003c\/b\u003e belongs to the \u003cb style=\"color: #0056b3;\"\u003eFlex IO\u003c\/b\u003e series by \u003cb style=\"color: #0056b3;\"\u003eRockwell Automation\u003c\/b\u003e. Plant technicians deploy this 16-channel discrete input module close to field sensors to streamline cabinet wiring, minimize signal degradation, and maximize system throughput across complex manufacturing cells.\u003c\/p\u003e\n\u003ch3\u003eTechnical Architecture \u0026amp; Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100.061%; height: 352.841px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 19.6023px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 19.6023px;\"\u003e\u003cb style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003e\u003cb style=\"color: #0056b3;\"\u003e1794-IB16\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 19.6023px;\"\u003e\u003cstrong\u003eProduct Series \u0026amp; Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 19.6023px;\"\u003e\n\u003cb style=\"color: #0056b3;\"\u003eFlex IO\u003c\/b\u003e 16-Channel 24VDC Sinking Discrete Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eInput Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003e16 single-ended, non-isolated sinking inputs grouped in a single bank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eVoltage Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003e24VDC nominal operating voltage, 19.2 to 31.2VDC operating range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eCurrent Thresholds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003e2.0mA minimum ON-state current, 8.0mA nominal, 1.5mA maximum OFF-state current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eSelectable Filter Times\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003eConfigurable from 256 microseconds up to 32 milliseconds via output image table\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003ePower \u0026amp; Thermal Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003eMaximum 6.1W power loss; maximum 20.8 BTU\/hr thermal output at 31.2VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eEnvironmental Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003eOperating temperature range from 0 to 55°C; 5% to 95% non-condensing humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 28.5841%; height: 39.2045px;\"\u003e\u003cstrong\u003eHazardous Certifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.6968%; height: 39.2045px;\"\u003eClass I Division 2, Class I Zone 2, UL, CSA, and CE compliant directives\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Blueprint\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module onto standard DIN rails or directly onto flat backplanes using approved hardware.\u003c\/li\u003e\n\u003cli\u003eSeat the unit firmly onto compatible terminal bases including 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK, 1794-TBKD, or 1794-TB37DS.\u003c\/li\u003e\n\u003cli\u003eVerify that keyswitch position 2 aligns properly with the base plate before locking the assembly into place.\u003c\/li\u003e\n\u003cli\u003eTerminate field sensor wires up to 12 AWG (4 square millimeters) into the designated terminal blocks.\u003c\/li\u003e\n\u003cli\u003eAttach a compatible communication adapter such as DeviceNet, ControlNet, EtherNet\/IP, or Universal Remote I\/O to the network rail.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommissioning \u0026amp; Maintenance Guidelines\u003c\/h3\u003e\n\u003cp\u003eThe module features 16 individual yellow status indicators on the field side to confirm immediate device-driven signal states. Commissioning engineers can program custom input filter times from 256 microseconds to 32 milliseconds to suppress electrical noise in high-interference environments. Flexbus current draw remains minimal at 30mA from the 5VDC backplane supply.\u003c\/p\u003e\n\u003ch3\u003eCompatibility Framework\u003c\/h3\u003e\n\u003cp\u003eThis hardware interfaces seamlessly with any standard 1794 Flex IO communication adapter (1794-AENT, 1794-ADN, 1794-ASB, 1794-APB, 1794-ACN). It requires compatible terminal bases to route field power and discrete sensor signals safely without modifying backplane architectures.\u003c\/p\u003e\n\u003ch3\u003eCertification Matrix\u003c\/h3\u003e\n\u003cp\u003eBuilt for harsh industrial deployments, the module carries global safety listings including UL, CE, CSA, and hazardous location ratings for Class I Division 2 (Groups A, B, C, D) and Class I Zone 2 (Group IIC) atmospheres.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eEvery purchase includes one factory-sealed \u003cb style=\"color: #0056b3;\"\u003e1794-IB16\u003c\/b\u003e discrete input module. Global PLC Spare HUB backs every unit with a reliable 12-month operational warranty.\u003c\/p\u003e\n\u003ch3\u003eLogistics \u0026amp; Shipping\u003c\/h3\u003e\n\u003cp\u003eGlobal PLC Spare HUB processes and dispatches orders within 24 to 48 hours. Expedited worldwide shipping is handled securely through trusted courier networks including FedEx, UPS, and DHL.\u003c\/p\u003e\n\u003ch3\u003eIndustrial Application Scenarios \u0026amp; Diagnostics\u003c\/h3\u003e\n\u003cp\u003eAutomation engineers deploy the \u003cb style=\"color: #0056b3;\"\u003e1794-IB16\u003c\/b\u003e across distributed manufacturing lines, automated material handling systems, wastewater treatment plants, and petrochemical skids. Diagnostic capabilities leverage front-panel LED mapping to isolate faulty field switches, wire breaks, or power supply sags instantly, reducing mean time to repair (MTTR) across continuous processes.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this module with dry contact mechanical switches?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, provided the external circuit supplies the necessary 24VDC wetting voltage and meets the minimum 2.0mA ON-state current threshold required by the sinking inputs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do my input signals fluctuate when machinery starts up nearby?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHigh electrical noise from variable frequency drives can trigger false states. Increase the software-configurable input filter time from 256 microseconds up to 32 milliseconds to smooth out transient noise spikes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens if the internal Flexbus supply drops below 5VDC?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA dropping backplane voltage can cause communication dropouts between the adapter and the input module. Verify power supply capacity on your rack's power distribution module.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I select the correct terminal base for my cabinet layout?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChoose screw-clamp bases like the 1794-TB3 for standard industrial wiring or spring-clamp versions like the 1794-TB3S if your facility mandates tool-less push-in wire termination to combat high vibration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it necessary to use shielded cables for digital field inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile unshielded Category 2 wiring is acceptable for standard runs, routing inputs through Category 2 shielded triad cables helps maintain noise immunity in high-EMI environments.\u003c\/p\u003e\n\u003ch3\u003eBuying Guide\u003c\/h3\u003e\n\u003cp\u003eWhen selecting distributed I\/O modules, evaluate your controller network topology, local environmental constraints, and field device voltage requirements. Procuring exact factory items like the \u003cb style=\"color: #0056b3;\"\u003e1794-IB16\u003c\/b\u003e guarantees full software compatibility within Studio 5000 or RSLogix environments while eliminating costly cabinet redesigns.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IB16.png?v=1784615554\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013983985846,"sku":"1794-IB16","price":133.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IB16_345fe9f7-95e5-431f-9893-a93d18fd12d2.jpg?v=1784616764"},{"product_id":"1794-ob16p-allen-bradley-flex-i-o-16-channel-sourcing-output-module","title":"1794-OB16P Allen-Bradley Flex I\/O 16-Channel Sourcing Output Module","description":"\u003ch3\u003e\u003cstrong\u003eEngineering Overview \u0026amp; Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OB16P\u003c\/strong\u003e\u003c\/span\u003e is a high-density discrete output module engineered by \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eRockwell Automation\u003c\/strong\u003e\u003c\/span\u003e for the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eFlex I\/O Series\u003c\/strong\u003e\u003c\/span\u003e. Designed for distributed automation frameworks, this unit provides sixteen current-sourcing output channels operating at a nominal 24V DC. It streamlines panel layout by combining high-speed switching performance with advanced electronic channel protection, eliminating the need for external fuses.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCore System Specifications Matrix\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth\u003e\u003cstrong\u003ePerformance Attribute\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eEngineering Parameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand \/ Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eRockwell Automation \/ Allen-Bradley\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OB16P\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eFlex I\/O Discrete Output Module\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Channels \u0026amp; Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 Non-isolated channels, Current Sourcing (PNP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eON-State Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10V DC minimum, 24V DC nominal, 31.2V DC maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Current Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5A per channel (8.0A total module current max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurge Current Profile\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5A for 50 ms, repeatable every 2 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal Switching Delay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOFF to ON: 0.5 ms max | ON to OFF: 1.0 ms max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower \u0026amp; Thermal Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.0W max power dissipation; 17.0 BTU\/hr thermal dissipation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlexbus Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60 mA @ 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhysical Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e46mm x 94mm x 53mm (1.8in x 3.7in x 2.1in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eOperational Environment \u0026amp; Compliance Tree\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eThermal Envelope:\u003c\/strong\u003e\u003c\/span\u003e Operational temperature range of 0°C to 55°C (32°F to 131°F); storage range from -40°C to 85°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHumidity Tolerance:\u003c\/strong\u003e\u003c\/span\u003e 5% to 95% non-condensing relative humidity parameters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eShock \u0026amp; Vibration Resistance:\u003c\/strong\u003e\u003c\/span\u003e Tested to 30g peak operating shock (11ms pulse) and 5g vibration across 10 to 500 Hz per IEC 68-2-6.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHazardous Approvals:\u003c\/strong\u003e\u003c\/span\u003e Class I Div 2 Groups A, B, C, D; Class I Zone 2 Group IIC; UL, CSA, and CE certified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment \u0026amp; Control System Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLogix PAC Controllers:\u003c\/strong\u003e Direct distributed integration with ControlLogix and CompactLogix rack controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Process Controllers:\u003c\/strong\u003e Fully compatible with SLC 500 and PLC-5 remote I\/O subsystems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNetwork Communication Adapters:\u003c\/strong\u003e Interfaces seamlessly via EtherNet\/IP, ControlNet, DeviceNet, and PROFIBUS adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMandatory Terminal Bases:\u003c\/strong\u003e Requires physical mounting on compatible terminal bases including 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK, and 1794-TBN.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIndustrial Applications \u0026amp; Diagnostic Capabilities\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OB16P\u003c\/strong\u003e\u003c\/span\u003e drives high-speed automation control loops across heavy discrete and hybrid process sectors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eSolenoid Valve Actuation:\u003c\/strong\u003e\u003c\/span\u003e Controls pneumatic and hydraulic directional control valves in high-cycle packaging lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eInductive Relay Interfacing:\u003c\/strong\u003e\u003c\/span\u003e Energizes control relay coils safely while absorbing inductive flyback spikes via electronic protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eMachine Status Signaling:\u003c\/strong\u003e\u003c\/span\u003e Manages 24V DC tower lights, horn annunciators, and status indicator arrays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eReal-Time LED Diagnostics:\u003c\/strong\u003e\u003c\/span\u003e 16 yellow front-panel indicators provide instant visual feedback on individual channel logic states for rapid troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFrom an industrial networking and maintenance perspective, deploying the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OB16P\u003c\/strong\u003e\u003c\/span\u003e requires careful attention to module current budgeting. Because all 16 outputs share a common sourcing architecture drawing up to 0.5A per channel, engineers must verify that the external 24V DC power supply can handle the 8A total load plus the Flexbus current requirements. Utilizing terminal bases with built-in spring-clamp connections (such as the 1794-TB3S) significantly reduces wire loosening under high operational vibration environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics, Fulfillment \u0026amp; Quality Guarantee\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition Status:\u003c\/strong\u003e 100% Brand New and Original Factory Sealed Packaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFulfillment Speed:\u003c\/strong\u003e Guaranteed dispatch within 24 to 48 hours of order clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Express Courier:\u003c\/strong\u003e Secure transit delivered via FedEx, UPS, or DHL with tracking capabilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Assurance:\u003c\/strong\u003e Protected by a comprehensive 12-Month Factory Defect Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: How do the built-in electronic protections handle short-circuit conditions on an individual channel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Unlike traditional modules with physical fuses, the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1794-OB16P\u003c\/strong\u003e\u003c\/span\u003e uses electronic fault sensing that automatically trips and latches off the affected channel during an overcurrent event without blowing hard fuses or requiring hardware replacements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Can I mix this sourcing output module with sinking input modules on the same Flex I\/O adapter rack?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Flex I\/O backplane architectures allow arbitrary mixing of digital input, digital output, analog, and specialty modules on a single communication adapter node.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What guidelines should I follow when routing field wiring to the terminal base?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Use Category 2 shielded or unshielded stranded copper wire up to 12 gauge (4mm2) with maximum 1.2mm insulation thickness, adhering to publication 1770-4.1 industrial grounding guidelines to mitigate electrical noise.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: Why does the module specify a maximum surge current rating of 1.5A for 50 milliseconds?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: This temporary high-current allowance accommodates the initial inrush surge common when energizing inductive loads like heavy solenoid coils and electromechanical relay gates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: What factors should guide my selection between screw-clamp and spring-clamp terminal bases?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Select screw-clamp bases (like the 1794-TB3) for legacy compatibility and high torque pull-down preferences, or choose spring-clamp bases (like the 1794-TB3S) for vibration-heavy applications where screw retightening maintenance needs to be eliminated.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OB16P.png?v=1784615576\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013984805046,"sku":"1794-OB16P","price":156.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OB16P_8e2cc214-1f2c-49d6-adbb-e6a3300ab771.jpg?v=1784616728"},{"product_id":"1794-im8-allen-bradley-flex-i-o-8-channel-digital-ac-input-module","title":"1794-IM8 Allen Bradley Flex I\/O 8 Channel Digital AC Input Module","description":"\u003ch3\u003e\u003cb\u003eProduct Overview\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM8\u003c\/b\u003e\u003c\/span\u003e is a high-voltage digital input module from the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley Flex I\/O Series\u003c\/b\u003e\u003c\/span\u003e by Rockwell Automation. Built for modular distributed control systems, this module provides 8 non-isolated AC input channels operating at a nominal 220V\/240V AC line voltage. The unit mounts directly onto a 1794-TBN terminal base unit, combining the flexibility of remote I\/O with a compact footprint (46mm x 94mm x 53mm). Keying is enforced via an 8-position mechanical keyswitch to prevent improper module insertion during maintenance. Front-panel field-side yellow LED indicators give technicians immediate visual feedback for each channel state.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwell Automation \/ \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eAllen-Bradley\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eCatalog Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM8\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eProduct Series\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003eFlex I\/O Series\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eModule Type\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e220V\/240V AC Digital Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNumber of Inputs\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8 non-isolated channels (1 group of 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eTerminal Base Unit Required\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCat. No. 1794-TBN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Operating Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e220V AC \/ 240V AC (47 to 63 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOperating Voltage Range\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e159V AC to 264V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eON-State Voltage (Min.)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e159V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOFF-State Voltage (Max.)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e40V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eON-State Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e5.27 mA min. (@ 159V AC); 9.88 mA nom. (@ 220V AC); 13.21 mA max. (@ 264V AC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOFF-State Current (Max.)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2.6 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eNominal Input Impedance\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e22.3 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eFlexbus Current (Max.)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e30 mA @ 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003ePower \/ Thermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4.7 W max. \/ 16.2 BTU\/hr max. @ 264V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eIsolation Withstand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eUser-to-system isolation 100% tested at 2600V DC for 1 second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eKeyswitch Position\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePosition 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eChannel Status Indicators\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8 yellow LEDs (driven by field-side device signals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eConductor Routing Category\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCategory 1 (per Publication 1770-4.1); max wire size 12 AWG (4 mm²) stranded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eOperating Temperature\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0°C to 55°C (32°F to 131°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cb\u003eHazardous Area Certifications\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eClass I Div 2 Groups A,B,C,D; Class I Zone 2 Group IIC; UL, CSA, CE marked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eInput Filter Time Configurations\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eEngineers can adjust software filter settings via the output image table (Bits 00-02) to compensate for contact bounce, line transients, or noisy field environments:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 0 (Bits 02:0, 01:0, 00:0 - Default):\u003c\/b\u003e OFF to ON = 7.5 ms | ON to OFF = 26.5 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 1 (Bits 02:0, 01:0, 00:1):\u003c\/b\u003e OFF to ON = 8.0 ms | ON to OFF = 27.0 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 2 (Bits 02:0, 01:1, 00:0):\u003c\/b\u003e OFF to ON = 9.0 ms | ON to OFF = 28.0 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 3 (Bits 02:0, 01:1, 00:1):\u003c\/b\u003e OFF to ON = 10.0 ms | ON to OFF = 29.0 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 4 (Bits 02:1, 01:0, 00:0):\u003c\/b\u003e OFF to ON = 12.0 ms | ON to OFF = 31.0 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 5 (Bits 02:1, 01:0, 00:1):\u003c\/b\u003e OFF to ON = 16.0 ms | ON to OFF = 35.0 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 6 (Bits 02:1, 01:1, 00:0):\u003c\/b\u003e OFF to ON = 24.5 ms | ON to OFF = 44.0 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFilter Time 7 (Bits 02:1, 01:1, 00:1):\u003c\/b\u003e OFF to ON = 42.0 ms | ON to OFF = 60.5 ms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTarget Machinery \u0026amp; System Compatibility\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM8\u003c\/b\u003e\u003c\/span\u003e module interfaces seamlessly with standard high-voltage AC discrete sensors, mechanical switches, and field devices. It fits within wider Allen-Bradley automation architectures using Flex I\/O adapters (EtherNet\/IP, ControlNet, or PROFIBUS DP). Target equipment includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e220V AC line-powered limit switches and heavy-duty pushbuttons\u003c\/li\u003e\n\u003cli\u003eMotor starter auxiliary contact feedback circuits\u003c\/li\u003e\n\u003cli\u003eProcess solenoid valve limit switch position monitoring\u003c\/li\u003e\n\u003cli\u003eHigh-voltage pressure and float switches in water\/wastewater treatment\u003c\/li\u003e\n\u003cli\u003eIndustrial conveyor control panels utilizing 230V AC control voltage loops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic \u0026amp; Monitoring Capabilities\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThis module provides real-time signal conditioning and hardware verification for discrete high-voltage inputs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eField-Side LED Status:\u003c\/b\u003e Eight individual yellow LEDs indicate valid ON-state field signals directly from the terminal base without depending on controller backplane communications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSelectable De-glitching:\u003c\/b\u003e Eight configurable filter time settings allow software engineers to suppress contact bounce and electrical noise spikes without adding hardware RC filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBackplane Verification:\u003c\/b\u003e Built-in Flexbus monitoring ensures full backplane contact and power delivery prior to sending valid input data to the main PLC processor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging Details, Fast Delivery \u0026amp; Warranty\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eItem Condition:\u003c\/b\u003e New \u0026amp; Original in Factory Packaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Terms:\u003c\/b\u003e 12 Months full replacement warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandard Dispatch:\u003c\/b\u003e Ships within 24 to 48 hours after payment confirmation\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExpress Freight Carriers:\u003c\/b\u003e FedEx, UPS, and DHL worldwide express shipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eIn modern industrial retrofits, engineering teams often face legacy control panels that use 220V\/240V AC control logic rather than 24V DC. The \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM8\u003c\/b\u003e\u003c\/span\u003e allows direct interface to high-voltage AC field switches without requiring intermediate interposing relays. When installing, always verify that your terminal base is set to \u003cb\u003eKeyswitch Position 8\u003c\/b\u003e before snapping the module into place. If you encounter erratic input switching, check the off-state leakage current of solid-state sensors connected to the inputs — any leakage exceeding 2.6 mA can keep the 22.3 kΩ input circuit above the 40V AC OFF threshold, causing false ON indications in your Logix controller.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What terminal base unit must be paired with the 1794-IM8 module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e This module mounts directly on the Cat. No. 1794-TBN terminal base unit, which provides screw-clamp terminals for high-voltage AC wiring connections.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why does an input point stay ON even when the field switch is open?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Solid-state field devices (like proximity switches) often have off-state leakage current. If leakage exceeds 2.6 mA into the 22.3 kΩ input impedance, the voltage stays above the 40V AC OFF threshold. Installing a resistor in parallel across the input terminals solves this issue.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How do I change the input filter times on the 1794-IM8 in Studio 5000 or RSLogix 5000?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Input filter times are set by writing to configuration bits 00, 01, and 02 in the module output image table. Selecting values from 0 to 7 adjusts the OFF-to-ON filter time from 7.5 ms up to 42 ms.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can I mix 24V DC modules and 220V AC modules on the same Flex I\/O rail assembly?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Yes. Flex I\/O backplanes support mixed voltage modules on the same rail. However, you must route high-voltage 220V AC field wiring separately from low-voltage 24V DC field wiring according to Category 1 isolation standards.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Selection Guide: When should I choose the 1794-IM8 over the 1794-IA8 module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA:\u003c\/b\u003e Choose the \u003cspan style=\"color: #0056b3;\"\u003e\u003cb\u003e1794-IM8\u003c\/b\u003e\u003c\/span\u003e for 220V\/240V AC nominal field circuits (operating between 159V and 264V AC). Choose the 1794-IA8 for lower 120V AC nominal field circuits (operating between 85V and 132V AC).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IM8.png?v=1784615138\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013985001654,"sku":"1794-IM8","price":155.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IM8_a7ca2a39-271a-4d25-a5b2-716808cbd7b0.jpg?v=1784615282"},{"product_id":"1794-oa16-16-point-ac-digital-output-module-allen-bradley-flex-i-o-series","title":"1794-OA16 16-Point AC Digital Output Module | Allen-Bradley Flex I\/O Series","description":"\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #d35400;\"\u003e1794-OA16\u003c\/span\u003e\u003c\/strong\u003e is a cornerstone component of the Rockwell Automation Flex I\/O distributed architecture. Our technical experts highlight its extreme versatility in handling inductive AC loads, such as contactors and sirens. Because the channels are non-isolated, this module is exceptionally compact, making it the primary choice for space-constrained industrial control cabinets where high-density 120VAC output switching is required.\u003c\/p\u003e\n\n\u003ch3\u003eApplication Suitability and Diagnostic Capability\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSuitable Equipment:\u003c\/strong\u003e Compatible with all 1794 Flex I\/O communication adapters for seamless integration into Logix or legacy PLC systems.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCore Applications:\u003c\/strong\u003e Energizing AC relay coils, solenoid-actuated valves, contactor control, and high-visibility industrial alarm signaling (horns\/buzzers).\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiagnostic Capability:\u003c\/strong\u003e Features 16 dedicated yellow LED status indicators for per-channel output verification, allowing maintenance staff to pinpoint signal faults instantly without secondary diagnostic tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Allen-Bradley (Rockwell Automation)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #d35400;\"\u003e1794-OA16\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e 16-Channel Non-isolated Digital AC Output\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVoltage Range:\u003c\/strong\u003e 74 to 132 VAC (120 VAC Nominal)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 0.5A per channel (4.0A total module current)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eScan Delay:\u003c\/strong\u003e ½ AC cycle (Off-to-On\/On-to-Off)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 4.7 Watts at 0.5A maximum\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnvironmental:\u003c\/strong\u003e 0 to 55°C operating range; 5G vibration resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConfiguration Breakdown (Flex I\/O Series)\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1794:\u003c\/strong\u003e Flex I\/O Platform Base\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOA:\u003c\/strong\u003e AC Digital Output Module\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e16:\u003c\/strong\u003e 16-Channel Density Configuration\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLogistics and Warranty Assurance\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShipping Partners:\u003c\/strong\u003e Secure and priority worldwide transit via FedEx, UPS, or DHL.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Rapid order fulfillment with 24-48 hour processing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Protected by our industry-standard 12-month quality and performance guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEngineering Frequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why is external fusing required with the 1794-TBNF base, but not others?\u003c\/strong\u003e\u003cbr\u003e\nA: The 1794-TBNF base includes integrated fuse holders specifically designed to protect the non-isolated outputs of the \u003cstrong\u003e\u003cspan style=\"color: #d35400;\"\u003e1794-OA16\u003c\/span\u003e\u003c\/strong\u003e; using a non-fused base (like the TBN) necessitates external circuit protection to satisfy electrical safety codes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How does the \"non-isolated\" nature of this module affect my wiring strategy?\u003c\/strong\u003e\u003cbr\u003e\nA: Because outputs are non-isolated, all channels share a common return path to the AC source; ensure your common wiring is correctly sized for the aggregate load and avoid mixing different voltage phases within the same module.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Selection Guide: How do I choose the right terminal base for my cabinet space?\u003c\/strong\u003e\u003cbr\u003e\nA: If you require integrated fusing, opt for the 1794-TBNF. For standard space-saving applications, the 1794-TB2 or TB3 offers a smaller footprint, but remember you must provide your own independent overcurrent protection.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Experience Tip: What causes the 2.25 mA off-state leakage current?\u003c\/strong\u003e\u003cbr\u003e\nA: This is a byproduct of the module's internal snubbing circuitry; be cautious when using this module to drive very low-power loads, as this leakage current can sometimes keep sensitive indicators or relays energized even when commanded \"OFF.\"\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the most efficient way to maintain the 1794-OA16 in high-vibration environments?\u003c\/strong\u003e\u003cbr\u003e\nA: Regularly inspect the terminal base-to-module locking mechanism. The 5G vibration rating is contingent upon the module being securely seated and the keyswitch correctly positioned (Position 8) to prevent accidental mismating.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013989654710,"sku":"1794-OA16","price":136.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OA16.jpg?v=1779703274"},{"product_id":"1794-ib8-allen-bradley-flex-i-o-digital-input-module-plc-expansion","title":"1794-IB8 Allen-Bradley Flex I\/O Digital Input Module PLC Expansion","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1794-IB8 Allen-Bradley Flex I\/O Digital Input Module\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eStructured Product Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e1794-IB8\u003c\/span\u003e\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eSeries → \u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1794-flex-i-o\"\u003e\u003cstrong\u003eFlex I\/O 1794\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eType → Digital Input Module\u003c\/li\u003e\n\u003cli\u003eInput Design → 8 Current Sinking Channels\u003c\/li\u003e\n\u003cli\u003eMounting → DIN Rail with Terminal Base\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eConfiguration Breakdown\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Layer\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eNominal Voltage → 24V DC\u003c\/li\u003e\n\u003cli\u003eOperating Voltage → 10–31.2V DC\u003c\/li\u003e\n\u003cli\u003eOn-State Current → 2–12 mA\u003c\/li\u003e\n\u003cli\u003eOff-State Voltage → ≤5V DC\u003c\/li\u003e\n\u003cli\u003eInput Impedance → 4.6 kΩ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Layer\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eFlexBus Current → 20 mA @ 5V DC\u003c\/li\u003e\n\u003cli\u003ePower Dissipation → 3.5W max\u003c\/li\u003e\n\u003cli\u003eHot Swap Capability → Supported\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNetwork Layer\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eEtherNet\/IP → Supported\u003c\/li\u003e\n\u003cli\u003eControlNet → Supported\u003c\/li\u003e\n\u003cli\u003eDeviceNet → Supported\u003c\/li\u003e\n\u003cli\u003eRemote I\/O → Compatible\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eMechanical and Interface Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWeight: 0.19 lbs (0.09 kg)\u003c\/li\u003e\n\u003cli\u003eTerminal Base Compatibility:\n\u003cul\u003e\n\u003cli\u003e1794-TB3\u003c\/li\u003e\n\u003cli\u003e1794-TB3S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eInstallation via DIN rail mounting\u003c\/li\u003e\n\u003cli\u003eCompact modular footprint\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eOperational Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Temperature: 0°C to 55°C\u003c\/li\u003e\n\u003cli\u003eHumidity Range: 5% to 95% non-condensing\u003c\/li\u003e\n\u003cli\u003eStable signal acquisition across all channels\u003c\/li\u003e\n\u003cli\u003eOptimized for distributed I\/O architectures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic and Status Indication\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e16 LED indicators for channel status\u003c\/li\u003e\n\u003cli\u003eReal-time input signal visualization\u003c\/li\u003e\n\u003cli\u003eSupports diagnostic module variants\u003c\/li\u003e\n\u003cli\u003eImproves troubleshooting efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplication Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDistributed control systems\u003c\/li\u003e\n\u003cli\u003eFactory automation lines\u003c\/li\u003e\n\u003cli\u003eProcess monitoring systems\u003c\/li\u003e\n\u003cli\u003eMaterial handling equipment\u003c\/li\u003e\n\u003cli\u003eMachine control panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003e1794-IB8\u003c\/strong\u003e\u003c\/span\u003e delivers reliable digital signal acquisition in modular systems. It suits applications requiring flexible I\/O expansion. It integrates efficiently with Flex I\/O architectures. Engineers select it for hot-swap capability and network versatility. It performs well in dynamic industrial environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics and Warranty\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 months\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch Time:\u003c\/strong\u003e 24–48 hours\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Options:\u003c\/strong\u003e FedEx, UPS, DHL\u003c\/li\u003e\n\u003cli\u003eIndustrial-grade packaging ensures safe delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the advantage of current sinking inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThey simplify wiring with sourcing field devices. They improve compatibility in industrial circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the module be replaced without shutdown?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, it supports hot swapping under power. This reduces downtime during maintenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to select a compatible terminal base?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChoose 1794-TB3 or 1794-TB3S based on wiring preference. Confirm mechanical fit and wiring requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat affects input signal stability?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNoise, grounding, and cable quality impact signals. Use shielded cables for better performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I consider diagnostic variants?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse them in critical systems requiring fault detection. They improve maintenance visibility and system uptime.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45014018883766,"sku":"1794-IB8","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IB8_4ac14c6f-75e0-44b4-a8fa-8a1dccca02f2.jpg?v=1777534542"},{"product_id":"1794-ov16-allen-bradley-flex-i-o-16-point-digital-sinking-output-module","title":"1794-OV16 Allen-Bradley FLEX I\/O 16-Point Digital Sinking Output Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e is a high-density 16-point digital output module.\u003c\/li\u003e\n\u003cli\u003eIt is a key component of the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1794-flex-i-o\"\u003eFLEX I\/O\u003c\/a\u003e 1794\u003c\/span\u003e\u003c\/strong\u003e series for distributed control.\u003c\/li\u003e\n\u003cli\u003eThis \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e unit utilizes current-sinking logic for 24V DC applications.\u003c\/li\u003e\n\u003cli\u003eFeatures \"Removal and Insertion Under Power\" (RIUP) for maximum system availability.\u003c\/li\u003e\n\u003cli\u003eThe compact \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e design reduces panel space and simplifies field wiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/span\u003e\u003c\/strong\u003e \/ Rockwell Automation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eFLEX I\/O 1794\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Count:\u003c\/strong\u003e 16 Sinking Outputs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e 24V DC (Range: 10V to 31.2V DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 500mA per channel; 8.0A total module maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Drop:\u003c\/strong\u003e Ultra-low 0.2V DC on-state maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeakage Current:\u003c\/strong\u003e 0.5mA maximum off-state leakage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching Speed:\u003c\/strong\u003e 0.5ms (Off-to-On) \/ 1.0ms (On-to-Off)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Current:\u003c\/strong\u003e 80mA Flexbus current draw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Load:\u003c\/strong\u003e 14.3 BTU\/hr maximum heat dissipation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e DIN-Rail mounted via compatible terminal base (e.g., 1794-TB3)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB’s Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e is prized for its maintenance-friendly modular architecture.\u003c\/li\u003e\n\u003cli\u003eRIUP functionality ensures that replacing a \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e does not interrupt other I\/O on the same adapter.\u003c\/li\u003e\n\u003cli\u003eIt provides a very stable 24V output with minimal internal voltage loss.\u003c\/li\u003e\n\u003cli\u003eIdeal for high-vibration industrial environments when used with proper DIN-rail hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment \u0026amp; Application Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Control:\u003c\/strong\u003e Driving 24V DC solenoid banks in pneumatic systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual Alerts:\u003c\/strong\u003e Controlling multi-color stack lights and industrial buzzers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay Isolation:\u003c\/strong\u003e Interfacing PLC logic with high-power mechanical contractors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Packaging:\u003c\/strong\u003e Discrete output control for fillers, cappers, and labelers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Lines:\u003c\/strong\u003e Managing sensor-triggered actuators in automotive manufacturing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic \u0026amp; Maintenance Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus LEDs:\u003c\/strong\u003e 16 individual yellow LEDs for real-time output signal tracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModular Swap:\u003c\/strong\u003e The \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e detaches from the wiring base without touching field wires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Diagnostics:\u003c\/strong\u003e Easy troubleshooting of external 24V supply issues via module indicators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Build:\u003c\/strong\u003e IP20 protection and wide operating temperature range for plant-floor use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping and Purchase Terms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpress Logistics:\u003c\/strong\u003e Worldwide shipping via FedEx, UPS, and DHL Express.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Dispatch:\u003c\/strong\u003e Orders are typically processed and shipped within 24-48 hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Guarantee:\u003c\/strong\u003e Includes a full \u003cstrong\u003e12-month quality warranty\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage List:\u003c\/strong\u003e One (1) \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e module; terminal base not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes the 1794-OV16 provide short-circuit protection?\u003c\/strong\u003e While robust, we recommend adding external fusing to the common supply line to protect against major field wiring shorts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich terminal bases are compatible with the 1794-OV16?\u003c\/strong\u003e The 1794-TB3 and 1794-TB3S are the primary compatible bases for this 16-point module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I use this module for high-speed pulse output?\u003c\/strong\u003e With a combined delay of 1.5ms, it is suitable for general discrete control but not for high-precision motion synchronization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat happens if I exceed the 8.0A module current limit?\u003c\/strong\u003e Exceeding the total current limit causes excessive thermal dissipation, which may trigger a thermal shutdown or damage the module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelection Guide: Why choose 1794-OV16 over a sourcing module?\u003c\/strong\u003e Choose the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1794-OV16\u003c\/span\u003e\u003c\/strong\u003e if your field actuators are pre-wired with a common positive (+) rail and require a negative (-) trigger.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45014022455478,"sku":"1794-OV16","price":174.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-OV16_2866ac32-c391-4a68-a267-33490bb8af29.jpg?v=1777358265"},{"product_id":"1794-ie4xoe2-rockwell-flex-io-high-density-analog-pac-module","title":"1794-IE4XOE2 Rockwell FLEX IO High-Density Analog PAC Module","description":"\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e is a versatile hybrid solution within the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eFLEX I\/O\u003c\/span\u003e\u003c\/strong\u003e ecosystem, specifically engineered to maximize cabinet space by combining input and output functions on a single footprint. This module is a \"Swiss Army Knife\" for engineers managing small-scale analog loops. By providing 4 high-resolution inputs and 2 outputs, the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e eliminates the need for separate modules in localized control clusters. Its non-isolated, single-ended design is optimized for cost-effective, high-density distributed I\/O architectures where common-mode noise is managed at the power supply level.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eAllen-Bradley 1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e is a high-density analog combination module. It features 4 single-ended inputs and 2 single-ended outputs, supporting both current (mA) and voltage (VDC) signals. This module interfaces with the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eFLEX I\/O\u003c\/span\u003e\u003c\/strong\u003e backplane through a required terminal base, providing a modular and hot-swappable I\/O solution. For technical wiring diagrams and step-response curves, we strongly recommend downloading the \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IE4XOE2.pdf?v=1774939465\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e installation manual\u003c\/a\u003e and user reference guide.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eRockwell Automation \/ Allen-Bradley\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Number:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Series:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eFLEX I\/O\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Configuration:\u003c\/strong\u003e 4 Single-Ended, Non-Isolated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Configuration:\u003c\/strong\u003e 2 Single-Ended, Non-Isolated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Signal Ranges:\u003c\/strong\u003e 0-20mA, 4-20mA, 0-10VDC, +\/- 10VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Signal Ranges:\u003c\/strong\u003e 0-20mA, 4-20mA, 0-10VDC, +\/- 10VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 12-bit plus sign\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion Method:\u003c\/strong\u003e Pulse Width Modulation (PWM) for Outputs; Successive Approximation for Inputs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 100 kOhms (Voltage) \/ 238 Ohms (Current)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Power:\u003c\/strong\u003e 24V DC nominal (19.2 to 31.2V DC range)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 4 Watts maximum at 31.2V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation and Terminal Bases\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Bases:\u003c\/strong\u003e Must be used with \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB2\u003c\/span\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB3\u003c\/span\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB3S\u003c\/span\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB3T\u003c\/span\u003e\u003c\/strong\u003e, or \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB3TS\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Horizontal or vertical DIN rail mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexBus Current:\u003c\/strong\u003e Draws 20mA from the backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Wiring:\u003c\/strong\u003e Support for solid and stranded copper wire determined by the selected base unit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic and Application Logic\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eData Format:\u003c\/strong\u003e Converted values are stored in a 16-bit, 2’s complement, left-justified format for direct PLC processing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e On-board LEDs facilitate quick field verification of power and module health.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Rejection:\u003c\/strong\u003e Integrated normal mode rejection filters (e.g., -10dB @ 50Hz for voltage) to maintain signal integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Suitability:\u003c\/strong\u003e Ideal for distributed control of variable frequency drives (VFDs), valve positioners, and pressure transmitters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping and Warranty Terms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch Time:\u003c\/strong\u003e Fast processing within 24-48 hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLogistics Partners:\u003c\/strong\u003e Global delivery via \u003cstrong\u003eFedEx\u003c\/strong\u003e, \u003cstrong\u003eUPS\u003c\/strong\u003e, or \u003cstrong\u003eDHL\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Period:\u003c\/strong\u003e Comprehensive 12-month functional guarantee.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e Includes one (1) \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e module in professional packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePurchase and Selection Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e when your application involves single-ended sensors sharing a common ground.\u003c\/li\u003e\n\u003cli\u003eEnsure the total current load on the voltage output does not exceed 3mA.\u003c\/li\u003e\n\u003cli\u003eVerify the conversion rates (256μs per channel) align with your PID loop requirements.\u003c\/li\u003e\n\u003cli\u003eFor high-vibration environments, prioritize the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB3S\u003c\/span\u003e\u003c\/strong\u003e spring-clamp terminal base for secure wiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the impact of using non-isolated inputs on the 1794-IE4XOE2?\u003c\/strong\u003e\u003cbr\u003eSince inputs are non-isolated, all signals must share a common return. If your sensors have different ground potentials, you may experience ground loops and signal drift.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the PWM conversion affect output performance?\u003c\/strong\u003e\u003cbr\u003ePulse Width Modulation provides a reliable analog output but requires proper impedance matching; the voltage output can handle a maximum of 3mA load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix current and voltage signals on the same module?\u003c\/strong\u003e\u003cbr\u003eYes, individual channels are configurable, allowing you to run a 4-20mA pressure transmitter on one input and a +\/-10V position sensor on another.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is my data shifted to the left in the 16-bit register?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IE4XOE2\u003c\/span\u003e\u003c\/strong\u003e uses left-justified 16-bit 2's complement format to maintain compatibility across different Logix controllers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat terminal base is best for high-temperature applications?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-TB3T\u003c\/span\u003e\u003c\/strong\u003e is often selected for its extra terminals, which help with signal grounding and shield termination in complex thermal environments.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45014041723062,"sku":"1794-IE4XOE2","price":161.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IE4XOE2_5b71ac72-e85c-477b-89b2-3b606cc43136.jpg?v=1774944718"},{"product_id":"1794-if8ih-allen-bradley-flex-i-o-hart-analog-input-module","title":"1794-IF8IH Allen-Bradley Flex I\/O HART Analog Input Module","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e Allen-Bradley Flex I\/O HART Analog Input Module Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley \u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e is a high-density HART-enabled analog input module designed for the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eFlex I\/O\u003c\/span\u003e\u003c\/strong\u003e platform. This module integrates eight isolated, single-ended channels, providing superior signal integrity by eliminating ground loops in complex industrial environments. Engineered for precision, the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e utilizes Sigma-Delta conversion technology to deliver high-resolution data acquisition for both unipolar and bipolar signals. It is an essential component for distributed control architectures requiring reliable HART instrument communication.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specification Matrix\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \/ \u003cstrong\u003eRockwell Automation\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eFlex I\/O\u003c\/span\u003e 1794\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Count:\u003c\/strong\u003e 8 Isolated, Single-Ended Channels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion Type:\u003c\/strong\u003e Sigma-Delta (High Precision)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnipolar Resolution:\u003c\/strong\u003e 16 Bits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBipolar Resolution:\u003c\/strong\u003e 15 Bits + Sign\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal DC Voltage:\u003c\/strong\u003e 19.2 to 31.2V DC (Nominal 24V DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexbus Current:\u003c\/strong\u003e 80 mA @ 5V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 4.8 Watts maximum @ 31.2V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e 16.4 BTU\/hr @ 31.2V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Rating:\u003c\/strong\u003e Open Enclosure; 0°C to 55°C (32°F to 131°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3.7 x 3.7 x 2.6 inches (94 x 94 x 66 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB’s Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e stands out due to its dual-layered isolation—both channel-to-channel and channel-to-backplane. Unlike standard modules, the \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e allows for direct HART asset management, enabling maintenance teams to extract secondary variables and device diagnostics without extra bypass hardware. For engineers migrating from older 1794-IF8 series, this module offers a significant jump in noise rejection and signal precision.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eEquipment Compatibility \u0026amp; Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Terminal Bases:\u003c\/strong\u003e \u003cstrong\u003e1794-TB3\u003c\/strong\u003e, \u003cstrong\u003e1794-TB3S\u003c\/strong\u003e (Requires shielded wiring).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eController Integration:\u003c\/strong\u003e ControlLogix, CompactLogix, and PLC-5 via Flex I\/O adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHazardous Zones:\u003c\/strong\u003e Approved for North American Hazardous Location standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical Scenarios:\u003c\/strong\u003e Chemical dosing, refinery tank level monitoring, and high-precision pressure loops where ground potential differences are common.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic \u0026amp; Maintenance Capabilities\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal-time HART Data:\u003c\/strong\u003e Access device status, manufacturer ID, and tag information directly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Validation:\u003c\/strong\u003e Detects wire-break and out-of-range conditions via the backplane interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e Factory calibrated with support for field-specific offset adjustments when necessary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Hierarchy:\u003c\/strong\u003e Use Category 2 for signal ports and Category 3 for power supply ports.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics \u0026amp; Warranty Assurance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Speed:\u003c\/strong\u003e Guaranteed dispatch within \u003cstrong\u003e24-48 hours\u003c\/strong\u003e from order confirmation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Carriers:\u003c\/strong\u003e Express delivery worldwide via \u003cstrong\u003eFedEx\u003c\/strong\u003e, \u003cstrong\u003eUPS\u003c\/strong\u003e, and \u003cstrong\u003eDHL\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Period:\u003c\/strong\u003e Full \u003cstrong\u003e12-month professional warranty\u003c\/strong\u003e on all industrial hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e One \u003cstrong\u003eAllen-Bradley \u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e module in secure ESD packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eBuyer Selection Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure your terminal base supports 3-wire or 2-wire shielding to prevent HART signal interference.\u003c\/li\u003e\n\u003cli\u003eCalculate the thermal load if mounting multiple \u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e\u003c\/strong\u003e modules in a single non-ventilated cabinet.\u003c\/li\u003e\n\u003cli\u003eVerify that your Flex I\/O Adapter (e.g., 1794-AENTR) firmware version supports HART pass-through data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eExpert FAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary advantage of Sigma-Delta conversion in the \u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSigma-Delta technology provides high-resolution oversampling, which significantly reduces electronic noise and improves the linearity of analog-to-digital conversion compared to older methods.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module require a specific type of cable for HART communication?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, we strongly recommend using individual shielded twisted-pair cables. This prevents crosstalk between the high-frequency HART digital carriers on adjacent channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the \u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e operate without an external DC power supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the module requires a dedicated 24V DC (19.2-31.2V) external source to power the analog circuitry and HART modems independently of the Flexbus.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the isolation feature benefit a hazardous area installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIsolation prevents fault currents in one area from propagating to the controller, which is critical for maintaining safety integrity in Class I Div 2 environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix HART and non-HART devices on the same \u003cspan style=\"color: #ff0000;\"\u003e1794-IF8IH\u003c\/span\u003e module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, each channel is independent. Non-HART 4-20mA devices will function as standard analog inputs, while HART-enabled devices will provide additional data layers.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45014041755830,"sku":"1794-IF8IH","price":162.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1794-IF8IH_8994e77e-7e14-4d95-8515-22f99c5d841d.jpg?v=1776755718"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/collections\/Allen-Bradley_1794_Flex_IO__1.webp?v=1774323586","url":"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1794-flex-i-o.oembed?page=2","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}