{"product_id":"allen-bradley-1771-obd-plc-5-digital-output-module","title":"Allen-Bradley 1771-OBD PLC-5 Digital Output Module","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1771-OBD\u003c\/strong\u003e is a PLC-5 series discrete output module developed by Allen-Bradley for industrial control applications requiring multi-channel DC switching capability. It provides 16 sourcing output points designed for driving field loads such as relays, solenoids, and indicator devices within PLC-based automation systems.\u003c\/p\u003e\n\u003cp\u003eThis module is designed for installation in Allen-Bradley 1771 I\/O chassis systems and is compatible with multiple rack configurations, excluding specific chassis types as defined by system architecture requirements. It is widely used in legacy PLC-5 installations where robust and high-current DC output control is required.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003eParameterSpecification\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003eModel\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003e\u003cstrong\u003e1771-OBD\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003eProduct Family\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003e16-Point DC Digital Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\"\u003eOutput Type\u003c\/td\u003e\n\u003ctd data-row=\"6\"\u003eSourcing discrete outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\"\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd data-row=\"7\"\u003e16 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"8\"\u003eVoltage Range\u003c\/td\u003e\n\u003ctd data-row=\"8\"\u003e10–60 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"9\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd data-row=\"9\"\u003e48 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"10\"\u003eMax Continuous Current per Output\u003c\/td\u003e\n\u003ctd data-row=\"10\"\u003e2 A (resistive load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"11\"\u003eMax Current per Module\u003c\/td\u003e\n\u003ctd data-row=\"11\"\u003e8 A total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"12\"\u003ePilot Duty Rating\u003c\/td\u003e\n\u003ctd data-row=\"12\"\u003e0.2 A per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"13\"\u003eBackplane Current\u003c\/td\u003e\n\u003ctd data-row=\"13\"\u003e400 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"14\"\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd data-row=\"14\"\u003e15.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"15\"\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd data-row=\"15\"\u003e53.3 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"16\"\u003eSurge Current\u003c\/td\u003e\n\u003ctd data-row=\"16\"\u003eUp to 4 A (10 ms, repeatable every 2 s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"17\"\u003eMinimum Load Current\u003c\/td\u003e\n\u003ctd data-row=\"17\"\u003e2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"18\"\u003eSignal Delay (DC Off)\u003c\/td\u003e\n\u003ctd data-row=\"18\"\u003e~50 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"19\"\u003eMounting Type\u003c\/td\u003e\n\u003ctd data-row=\"19\"\u003e1771 I\/O Rack Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"20\"\u003eCompatible Chassis\u003c\/td\u003e\n\u003ctd data-row=\"20\"\u003e1771-A1B to 1771-A4B (excluding 1771-A4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"21\"\u003eWiring Arms\u003c\/td\u003e\n\u003ctd data-row=\"21\"\u003e1771-WH \/ WHF \/ WHFB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"22\"\u003eWiring Torque\u003c\/td\u003e\n\u003ctd data-row=\"22\"\u003e7–9 in-lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"23\"\u003eData Format\u003c\/td\u003e\n\u003ctd data-row=\"23\"\u003eBCD or Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"24\"\u003eCoating\u003c\/td\u003e\n\u003ctd data-row=\"24\"\u003eConformal coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"25\"\u003eWeight\u003c\/td\u003e\n\u003ctd data-row=\"25\"\u003e1.85 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eFunctional Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1771-OBD\u003c\/strong\u003e module provides high-density discrete output control for PLC-5 systems, enabling centralized switching of DC loads across industrial machinery. Each channel operates independently, allowing flexible control of multiple actuators within a single rack-mounted module.\u003c\/p\u003e\n\u003cp\u003eIts rugged design supports stable operation in industrial environments where electrical noise, load variation, and continuous duty cycles are common.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis module is designed for use within Allen-Bradley 1771 I\/O architectures and integrates directly with PLC-5 processors. It supports standard field wiring arms for simplified installation and maintenance.\u003c\/p\u003e\n\u003cp\u003eTypical connected loads include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolenoid valves\u003c\/li\u003e\n\u003cli\u003eMotor contactors\u003c\/li\u003e\n\u003cli\u003eIndicator lamps\u003c\/li\u003e\n\u003cli\u003eRelay coils\u003c\/li\u003e\n\u003cli\u003eIndustrial actuators\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e16-channel DC sourcing output configuration\u003c\/li\u003e\n\u003cli\u003eWide voltage support from 10 to 60 VDC\u003c\/li\u003e\n\u003cli\u003eHigh per-channel current handling capability\u003c\/li\u003e\n\u003cli\u003eRack-mounted PLC-5 compatibility\u003c\/li\u003e\n\u003cli\u003eField-serviceable wiring arm interface\u003c\/li\u003e\n\u003cli\u003eConformal-coated protection for industrial environments\u003c\/li\u003e\n\u003cli\u003eStable switching performance for discrete control applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplication Areas\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturing automation systems\u003c\/li\u003e\n\u003cli\u003eMachine control panels\u003c\/li\u003e\n\u003cli\u003eMaterial handling equipment\u003c\/li\u003e\n\u003cli\u003eProcess control systems\u003c\/li\u003e\n\u003cli\u003eLegacy PLC-5 system maintenance\u003c\/li\u003e\n\u003cli\u003eIndustrial retrofit projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eIs the 1771-OBD still supported by Allen-Bradley?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIt is considered a legacy module and is primarily supported through existing installed base maintenance and spare parts channels.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCan it drive inductive loads directly?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eYes, but inductive loads such as solenoids or relays should be evaluated within surge and pilot duty limits.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhich PLC systems use this module?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIt is designed for PLC-5 systems using the Allen-Bradley 1771 I\/O chassis platform.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDoes it require a specific wiring arm?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eYes. Compatible wiring arms include 1771-WH, 1771-WHF, and 1771-WHFB depending on installation requirements.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43404515541082,"sku":"1771-OBD","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-OBD2.jpg?v=1779432459","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-obd-plc-5-digital-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}