{"product_id":"allen-bradley-1771-obd-plc-5-digital-output-module","title":"Allen-Bradley 1771-OBD PLC 5 Digital Output Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-OBD\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-OBD\u003c\/strong\u003e Digital Output Module, operates as a dedicated hardware component for discrete DC switching within Allen-Bradley PLC 5 I\/O chassis networks. It interfaces internal controller logic states with field-side actuators, switching up to 16 independent DC loads across a 10 to 60 VDC operating range.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1771-OBD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.54 lbs (0.70 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1771 Single-Slot I\/O Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +60 deg C (+32 to +140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e400 mA @ 5 VDC backplane current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Outputs\u003c\/td\u003e\n\u003ctd\u003e16 discrete channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10 to 60 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e2 A per output (resistive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Current Limit\u003c\/td\u003e\n\u003ctd\u003e8 A total per module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Duty Rating\u003c\/td\u003e\n\u003ctd\u003e0.2 A per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and Deterministic Networks\u003c\/h3\u003e\n\u003cp\u003eDesigned for direct integration into 1771 universal I\/O chassis, the card communicates across the local backplane bus to execute high-speed control logic commands from PLC 5 processors. Channel switching states are processed deterministically to maintain timing synchronization across connected field devices. Optimizing backplane bus communication velocity and preserving firmware flash compatibility ensures rapid output updates while isolating backplane logic from field-side voltage transients.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What are the current loading limits for individual channels and the overall 1771-OBD module?\u003c\/p\u003e\n\u003cp\u003eA: Each individual output channel supports up to 2 A resistive load (0.2 A pilot duty), while the maximum total current across all 16 channels must not exceed 8 A per module.\u003c\/p\u003e\n\u003cp\u003eQ: How much power does the module draw from the 1771 chassis backplane?\u003c\/p\u003e\n\u003cp\u003eA: The module draws 400 mA at 5 VDC from the local backplane power supply to operate its internal logic interface.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eTurn off chassis backplane power and field power supplies before inserting or removing the 1771-OBD module.\u003c\/li\u003e\n\u003cli\u003eVerify chassis keying bands match the slot positioning required for 1771 DC output cards.\u003c\/li\u003e\n\u003cli\u003eSlide the module into the card guide slot until the backplane connector seats completely, then secure the top and bottom latch arms.\u003c\/li\u003e\n\u003cli\u003eWire external 10 to 60 VDC power and field loads to the 1771 wiring arm, ensuring total module current does not exceed 8 A.\u003c\/li\u003e\n\u003cli\u003eRoute field DC output wiring away from low-level analog or communication cables to minimize electromagnetic interference.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52693179007256,"sku":"1771-OBD","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1771-OBD3.png?v=1789612248","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1771-obd-plc-5-digital-output-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}