{"product_id":"allen-bradley-1771-obn-b-plc-5-digital-dc-output-module","title":"Allen-Bradley 1771-OBN\/B PLC-5 Digital DC Output Module","description":"\u003ch2\u003eAllen-Bradley 1771-OBN\/B PLC-5 Digital DC Output Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for DC load switching in PLC-5 I\/O chassis, the \u003cstrong\u003eAllen-Bradley 1771-OBN\/B\u003c\/strong\u003e (\u003cstrong\u003e1771-OBN\u003c\/strong\u003e Digital DC Output Module) provides direct physical\/electrical execution through 8 sourcing output channels. The module operates with 10-30 VDC field signals and supports discrete control of DC actuators.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\/B\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\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.01 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e16.9 W maximum, 0.9 W minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDigital DC Output Modules\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\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDC sourcing output module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e8 sourcing outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Continuous Current Per Output\u003c\/td\u003e\n\u003ctd\u003e1.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Continuous Current Per Module\u003c\/td\u003e\n\u003ctd\u003e8 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Current\u003c\/td\u003e\n\u003ctd\u003e4 A for 1 ms, repeatable every 1 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Leakage Current\u003c\/td\u003e\n\u003ctd\u003e1 mA per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Voltage Drop\u003c\/td\u003e\n\u003ctd\u003eMaximum 2 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurn-On\/Off Delay\u003c\/td\u003e\n\u003ctd\u003eApproximately 10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e165 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1500 V AC rms tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRack mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eBDC or Natural Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 Industrial Control Output Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OBN\/B uses PLC-5 backplane communication for discrete output data transfer. The module provides I\/O density scaling through 8 individually controlled sourcing outputs designed for DC field devices. Output channels supply positive voltage to connected loads and are configured for devices requiring sink input connections.\u003c\/p\u003e\n\u003cp\u003eThe Allen-Bradley PLC-5 architecture uses deterministic rack-based I\/O communication. The module supports electrical separation through optical isolation and includes output status indication for field circuit monitoring.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of field devices can be connected to the 1771-OBN\/B output channels?\u003cbr\u003eA: The module provides 10-30 VDC sourcing outputs for DC loads such as solenoids, relays, pilot lights, and annunciators within the rated current limits.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane current requirement of the 1771-OBN\/B?\u003cbr\u003eA: The module requires 165 mA from the 5 VDC backplane supply.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module provide output isolation?\u003cbr\u003eA: Yes. The module includes optical isolation tested to 1500 V AC rms between control circuitry and field output circuits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-OBN\/B in a compatible 1771 I\/O chassis slot and confirm chassis power capacity before energizing the rack. Connect field wiring through the specified 1771-WA wiring arm and verify output polarity before connecting DC loads.\u003c\/p\u003e\n\u003cp\u003eSeparate DC output wiring from high-voltage AC conductors and high-frequency switching cables to reduce electrical interference. Use proper grounding practices for the chassis and apply cable shielding methods according to the installation environment.\u003c\/p\u003e\n\u003cp\u003eVerify each output channel current requirement against the module output ratings. Inspect terminal connections, module seating, and field wiring continuity before system commissioning.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43686008586330,"sku":"1771-OBN\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-OBN1.jpg?v=1784618407","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-obn-b-plc-5-digital-dc-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}