{"product_id":"allen-bradley-1771-obn-digital-dc-output-module","title":"Allen-Bradley 1771-OBN Digital DC Output Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-OBN\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-OBN\u003c\/strong\u003e Digital DC Output Module, operates as a dedicated hardware component for high-density load switching within PLC 5 rack-based control systems.\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-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\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\u003e0.94 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e330 mA (Backplane current)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Points\u003c\/td\u003e\n\u003ctd\u003e32 (4 sets of 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e10-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e0.5 A per output (8 A total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC 5 Backplane Integration and Firmware Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1771-OBN\u003c\/strong\u003e is engineered for deep integration within the PLC 5 I\/O chassis architecture. Execution of output commands is managed through the module-specific backplane bus communication velocity, ensuring synchronization with the host processor scan cycle. Users must verify firmware flash compatibility between the PLC 5 CPU and the module backplane interface to ensure deterministic execution of logic transitions. I\/O density scaling allows for the management of up to 32 independent output points, organized into four isolated sets. Conformal coating is applied to the PCB to maintain signal integrity and prevent oxidation in industrial environments.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1771-OBN support hot-swapping within the PLC 5 rack?\u003c\/p\u003e\n\u003cp\u003eA: No. The module does not support hot-swapping. The chassis must be de-energized to prevent arcing at the backplane connector or unintended output activation during the removal or insertion process.\u003c\/p\u003e\n\u003cp\u003eQ: How is the load current distributed across the output sets?\u003c\/p\u003e\n\u003cp\u003eA: The module provides 8 outputs per set, with a maximum continuous current of 2 A per set and 0.5 A per individual output. Total module current must not exceed 8 A to prevent thermal overload of the output circuitry.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003ePower down the I\/O rack and verify the absence of voltage before installation to prevent electrical damage to the backplane pins.\u003c\/li\u003e\n\u003cli\u003eUse the 1771-WH wiring arm for all field connections; ensure that wiring is routed away from high-voltage AC lines to prevent induced noise on the DC outputs.\u003c\/li\u003e\n\u003cli\u003eVerify that the load voltage is within the 10-30 VDC operating range before connecting field devices to the outputs.\u003c\/li\u003e\n\u003cli\u003eEnsure the output current load is balanced across the four sets to remain within the 8 A module limit.\u003c\/li\u003e\n\u003cli\u003eConfirm that the module is securely latched into the rack guide rails to ensure proper engagement with the backplane connector.\u003c\/li\u003e\n\u003cli\u003ePerform an I\/O test after power-up using the PLC programming software to verify channel addressing and confirm output state transitions.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53514866589880,"sku":"1771-OBN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1771-OBDC_6134ddd5-dc4e-450e-9611-260a13fabbea.jpg?v=1779853793","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1771-obn-digital-dc-output-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}