{"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","url":"https:\/\/www.plcsparehub.com\/products\/1794-of4i-analog-output-module-allen-bradley-flex-i-o-series","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}