{"product_id":"1762-ob8-allen-bradley-24v-dc-digital-output-module-for-micrologix-1200","title":"1762-OB8 Allen-Bradley 24V DC Digital Output Module for MicroLogix 1200","description":"\u003ch3\u003e\u003cb\u003e1762-OB8 | MicroLogix 1200 Digital Output Expansion\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eAllen-Bradley 1762-OB8\u003c\/b\u003e is an eight-point, 24V DC solid-state output module for the \u003cb\u003eMicroLogix 1200\u003c\/b\u003e control platform. It adds DC sourcing outputs to a compatible controller, allowing PLC logic to switch field devices such as indicator lamps, interposing relays, and other suitable DC loads.\u003c\/p\u003e\n\u003cp\u003eFor panel design and replacement planning, the key checks are output polarity and load type, per-point and total current, controller compatibility, and the available expansion power budget.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eOutput Architecture at a Glance\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003eEight DC output points:\u003c\/b\u003e provides discrete output capacity for additional control signals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eSourcing output type:\u003c\/b\u003e verify that the connected load and field wiring are designed for a sourcing output arrangement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003e24V DC operating range:\u003c\/b\u003e 20.4–26.4V DC, suitable for nominal 24V DC control circuits within the specified range.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eSolid-state switching:\u003c\/b\u003e supports rapid discrete control; the stated resistive-load switching delays are 0.1ms maximum in the ON state and 1.0ms maximum in the OFF state.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eDIN-rail mounting:\u003c\/b\u003e intended for installation as an expansion module in a compatible MicroLogix 1200 assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cb\u003eTechnical Data\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCatalog Number\u003c\/th\u003e\n\u003ctd\u003e\u003cb\u003e1762-OB8\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Family\u003c\/th\u003e\n\u003ctd\u003eMicroLogix 1200 Expansion I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eSolid-state digital DC output module\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNumber of Outputs\u003c\/th\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutput Voltage Category\u003c\/th\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Voltage Range\u003c\/th\u003e\n\u003ctd\u003e20.4–26.4V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutput Configuration\u003c\/th\u003e\n\u003ctd\u003eDC sourcing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Current per Point\u003c\/th\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Aggregate Output Current\u003c\/th\u003e\n\u003ctd\u003e4A per module\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIntermittent Surge Current\u003c\/th\u003e\n\u003ctd\u003e2A for 10ms; repeatable every 2 seconds, as specified\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum ON-State Voltage\u003c\/th\u003e\n\u003ctd\u003e1.0V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum OFF-State Leakage Current\u003c\/th\u003e\n\u003ctd\u003e1.0mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBackplane Current\u003c\/th\u003e\n\u003ctd\u003e115mA at 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePower Dissipation\u003c\/th\u003e\n\u003ctd\u003e1.6W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Expansion Distance\u003c\/th\u003e\n\u003ctd\u003e6 module lengths, subject to system configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGroup-to-Backplane Isolation\u003c\/th\u003e\n\u003ctd\u003eTested at 1200V AC or 1697V DC for 1 second, according to supplied specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003e0–55°C (32–131°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eStorage Temperature\u003c\/th\u003e\n\u003ctd\u003e−40–85°C (−40–185°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRelative Humidity\u003c\/th\u003e\n\u003ctd\u003e5–95%, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eShock \/ Vibration\u003c\/th\u003e\n\u003ctd\u003e30G shock; 5G vibration at 500Hz, as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Operating Altitude\u003c\/th\u003e\n\u003ctd\u003e6561ft (approximately 2000m), as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e90 × 87 × 40.4mm, as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003eApproximately 210g, as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCertifications\u003c\/th\u003e\n\u003ctd\u003eUL, c-UL, CE, as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e10611320152118\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUNSPSC\u003c\/th\u003e\n\u003ctd\u003e32151601\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003ci\u003eEngineering note: Confirm the latest Allen-Bradley documentation for the exact module revision and installation conditions before finalizing a design. Ratings such as current, surge, isolation, altitude, and environmental limits must be applied according to the manufacturer’s specified test conditions.\u003c\/i\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eApplication Fit: Where the 1762-OB8 Can Be Used\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003eMachine automation:\u003c\/b\u003e discrete control of compatible 24V DC pilot devices, relay coils, and status indicators.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003ePackaging and material handling:\u003c\/b\u003e PLC-controlled signals for conveyor sequencing, sorting logic, and machine status outputs, where the connected loads meet module ratings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eProcess skids and utility panels:\u003c\/b\u003e additional digital output points for non-safety control functions, subject to the system’s electrical design.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eEquipment retrofit:\u003c\/b\u003e replacement or expansion of an existing MicroLogix 1200 I\/O arrangement after checking catalog number, wiring, and controller compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eNot a direct substitute for:\u003c\/b\u003e safety-rated outputs, AC outputs, or loads that exceed the per-point or aggregate current limits. Use a suitably rated interposing device when the field load is outside the module’s direct switching capability.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eInstallation and Commissioning Checks\u003c\/b\u003e\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cb\u003eConfirm the controller and expansion arrangement.\u003c\/b\u003e Check that the MicroLogix 1200 controller, expansion configuration, and module placement support the 1762-OB8.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eVerify the field circuit.\u003c\/b\u003e Confirm the 24V DC supply, sourcing-output wiring, load polarity, and common connections against the module’s wiring diagram.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eCalculate current demand.\u003c\/b\u003e Keep each output within 0.5A and the module total within 4A. Check inrush or intermittent current separately; do not assume the surge rating permits continuous operation at that level.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eCheck the expansion power budget.\u003c\/b\u003e Include the module’s 115mA backplane draw at 5V DC and confirm the overall system’s supported expansion capacity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eTest outputs under load.\u003c\/b\u003e Verify commanded state, field voltage, load response, and temperature during commissioning.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003e\u003cb\u003eDiagnostic Approach\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 1762-OB8 provides discrete output switching; it should not be treated as a standalone diagnostic or safety-monitoring device. When an output does not operate as expected, use the following checks to isolate the cause:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003ePLC logic:\u003c\/b\u003e confirm the output address, program condition, and controller mode.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eModule indication:\u003c\/b\u003e inspect the relevant status indicator, if fitted, and compare it with the commanded output state.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eField voltage:\u003c\/b\u003e measure the voltage at the output terminal and at the load while the output is commanded ON.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eLoad and wiring:\u003c\/b\u003e check for an open circuit, incorrect polarity, loose terminal, short circuit, or an incompatible load.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eCurrent and thermal loading:\u003c\/b\u003e verify per-point and aggregate current, including startup demand, and inspect for abnormal heating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eIsolation test:\u003c\/b\u003e if the fault remains, isolate power and follow the manufacturer’s approved troubleshooting procedure before disconnecting or replacing the module.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor a suspected module failure, compare the same field circuit with a known-good, compatible output point or module only after confirming that the test will not create an unsafe machine condition.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB’s Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eWhen selecting an 1762-OB8 for a MicroLogix 1200 panel, the most common engineering oversight is to check the number of outputs but not the electrical load. Eight available points do not mean every point can continuously drive a 0.5A load at the same time without considering the 4A module total, load inrush, wiring, and ambient temperature.\u003c\/p\u003e\n\u003cp\u003eBefore ordering a replacement, compare the existing module’s catalog number and terminal wiring, confirm that the controller supports the required expansion configuration, and review whether the application needs sourcing DC outputs or a different output type. For critical equipment, validate the replacement in the panel documentation and commissioning plan.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eSupply, Warranty, and Shipping\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003eWarranty:\u003c\/b\u003e 12-month warranty.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eShipping options:\u003c\/b\u003e FedEx, UPS, or DHL, subject to destination and shipment arrangement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eOrdering support:\u003c\/b\u003e provide the full catalog number, required quantity, destination, and any packaging or condition requirements when requesting a quotation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003e\u003cb\u003e1. What should be checked before replacing an installed 1762-OB8?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eRecord the controller model, expansion-module sequence, field wiring, and load current. Confirm that the replacement has the same catalog number and output configuration, and that the system’s expansion and power limits remain satisfied.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003e2. Can all eight outputs be loaded to 0.5A continuously?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe supplied data lists 0.5A maximum per point and 4A maximum aggregate current. Since eight points at 0.5A total 4A, verify the manufacturer’s derating and operating conditions for simultaneous loading, ambient temperature, and the actual load type before designing around that limit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003e3. Is the 1762-OB8 suitable for driving a solenoid valve directly?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIt may be suitable if the valve coil is a compatible 24V DC load and its steady-state and inrush currents remain within the module’s ratings. Check the coil’s suppression requirements and switching behavior. If the coil exceeds the output rating or requires special protection, use an appropriately rated interposing interface.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003e4. What information helps determine whether this module is the right spare?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eProvide the existing module’s catalog number, MicroLogix 1200 controller model, output-device voltage and current, and a photo or drawing of the panel wiring. These details help distinguish a compatible DC sourcing module from AC, relay, or other DC output variants.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003e5. What is a practical first step when a PLC output is commanded ON but the field device stays OFF?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eCheck the PLC logic and output indication, then measure the voltage at the module terminal and across the load while commanded ON. If voltage is absent, investigate module status, supply, and wiring. If voltage is present but the device does not actuate, check load condition, polarity, current demand, and any external interposing circuit.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013902033078,"sku":"1762-OB8","price":133.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1762-OB8_7024f3fa-4a47-409c-aa9a-f35b6449dede.jpg?v=1792475302","url":"https:\/\/www.plcsparehub.com\/products\/1762-ob8-allen-bradley-24v-dc-digital-output-module-for-micrologix-1200","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}