{"product_id":"output-modules-allen-bradley-1771-obn","title":"Output Modules | Allen-Bradley 1771-OBN","description":"\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1771-OBN\u003c\/strong\u003e is a high-density 32-channel digital DC output module designed for the PLC-5 platform architecture. It provides reliable high-true sourcing outputs operating within a 10 to 30 VDC range, tailored for controlling various industrial actuators and indicator devices in legacy control systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical 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-OBN\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\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eOutput Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e32 (4 groups of 8 channels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e10 to 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Per Output\u003c\/td\u003e\n\u003ctd\u003e0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e330 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eSourcing (High-True)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eRack Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.91 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperational Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eArchitectural Layout and Channel Configuration\u003c\/h3\u003e\n\u003cp\u003eThe module organizes its 32 digital outputs into four isolated groups of eight channels each. Each group can interface with separate external power supplies to accommodate multi-voltage or segmented loop architectures within the same chassis. Front-panel LED indicators display individual channel status and fuse health for immediate diagnostics.\u003c\/p\u003e\n\u003ch3\u003eElectrical Ratings and Backplane Requirements\u003c\/h3\u003e\n\u003cp\u003eEach individual channel delivers up to 0.5 A of continuous output current, bounded by an 8 A total module limit. The internal logic circuitry draws a maximum backplane current of 330 mA from the 5 VDC chassis power supply. Built-in protection handles surge currents up to 2 A per output for 10 milliseconds to safeguard downstream components.\u003c\/p\u003e\n\u003ch3\u003eInstallation and Environmental Specifications\u003c\/h3\u003e\n\u003cp\u003eEngineered for standard rack mounting, the unit installs directly into compatible 1771 I\/O chassis backplanes. It features physical mechanical keying between slots 14-16 and 20-22 to prevent incorrect module insertion. The module operates effectively in industrial environments ranging from 0 to 60 deg C with relative humidity up to 95 percent non-condensing.\u003c\/p\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: What type of input devices do these sourcing outputs require?A: The 1771-OBN module utilizes sourcing outputs and requires sinking input field devices that provide a direct path to ground.\u003c\/p\u003e\n\u003cp\u003eQ: How are individual channel groups protected against overloads?A: Each of the four output groups is protected by a dedicated 4.0 A, 250 V normal-blow fuse located on the module.\u003c\/p\u003e\n\u003cp\u003eQ: Is this module compatible with all 1771 I\/O chassis types? A: No, it is compatible with 1771-A1B through -A4B or later chassis variants, but it cannot be used in legacy 1771-A1, -A2, and -A4 chassis.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53212577562904,"sku":"1771-OBN","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1771-OBDC_1__Cocoai_64dac8c5-fa66-4ed9-9692-37272a9d0a36.jpg?v=1794277339","url":"https:\/\/www.innoplcsync.com\/products\/output-modules-allen-bradley-1771-obn","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}