{"product_id":"allen-bradley-1771-obds-b-digital-dc-output-module","title":"Allen Bradley 1771-OBDS\/B Digital DC Output Module","description":"\u003ch2\u003eAllen Bradley 1771-OBDS\/B Digital DC Output Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for discrete DC load switching in PLC-5 1771 I\/O chassis systems, the \u003cstrong\u003eAllen Bradley 1771-OBDS\/B\u003c\/strong\u003e (\u003cstrong\u003e1771-OBDS\u003c\/strong\u003e Digital DC Output Module) provides direct physical\/electrical execution through sixteen current-limiting sourcing outputs. The module supports 10-60 VDC field devices with opto-electrical isolation and PLC backplane communication.\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-OBDS\/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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.8 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane current: 300 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital DC Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e16 Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eSourcing DC digital output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003e10-60 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-40 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Continuous Current Per Output\u003c\/td\u003e\n\u003ctd\u003e1 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\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eBDC or Natural Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm Compatibility\u003c\/td\u003e\n\u003ctd\u003e1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eOpto-electrical isolation tested to 1500 V AC rms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Feature\u003c\/td\u003e\n\u003ctd\u003eCurrent-limiting output protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eConformal coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eESD Immunity\u003c\/td\u003e\n\u003ctd\u003e4 kV contact discharge; 8 kV air discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eRack mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eUL Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 Digital Output and Protection Architecture\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OBDS\/B provides sixteen individually controlled sourcing DC outputs for PLC-5 control applications. Each output channel supplies current to connected DC field loads and incorporates current-limiting protection for overload and short-circuit conditions.\u003c\/p\u003e\n\u003cp\u003eThe module supports PLC-5 backplane bus communication and transfers digital output states from the controller to external devices such as solenoids, relays, pilot lights, and annunciators.\u003c\/p\u003e\n\u003cp\u003eOpto-electrical isolation separates field-side output circuits from internal PLC logic circuitry. The conformal coating provides additional protection for the module electronics during installation in industrial environments.\u003c\/p\u003e\n\u003ch3\u003eIndustrial Control Backplane Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OBDS\/B follows the Allen Bradley PLC-5 I\/O architecture and supports I\/O density scaling through 1771 chassis expansion. The module operates as a rack-based component using deterministic backplane communication rather than standalone network addressing.\u003c\/p\u003e\n\u003cp\u003eThe module supports BDC and Natural Binary data formats for controller data exchange. System operation requires correct chassis slot configuration, I\/O addressing, and PLC-5 processor compatibility.\u003c\/p\u003e\n\u003cp\u003eFirmware flash compatibility is not specified for this PLC-5 hardware generation. Configuration depends on installed hardware revision, controller programming, and chassis setup.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many output channels are available on the 1771-OBDS\/B?\u003cbr\u003eA: The module provides sixteen sourcing DC digital output channels.\u003c\/p\u003e\n\u003cp\u003eQ: What DC voltage range is supported by the 1771-OBDS\/B?\u003cbr\u003eA: The module supports a 10-60 VDC voltage category with a specified operating range of 10-40 VDC.\u003c\/p\u003e\n\u003cp\u003eQ: What protection functions are included in the output design?\u003cbr\u003eA: Each output channel includes current-limiting protection for overload and short-circuit conditions.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-OBDS\/B module in a compatible 1771 I\/O chassis slot and verify chassis keying before insertion. Connect field wiring through the 1771-WH wiring arm and confirm sourcing output polarity before applying power.\u003c\/p\u003e\n\u003cp\u003eRoute DC output wiring separately from high-voltage conductors, motor cables, and switching power circuits. Use appropriate cable shielding and grounding practices according to site electrical standards.\u003c\/p\u003e\n\u003cp\u003eVerify that connected loads remain within the specified current limits of individual outputs and the total module capacity. Confirm PLC-5 addressing, output mapping, and controller configuration before enabling field devices.\u003c\/p\u003e\n\u003cp\u003eFollow electrostatic discharge handling procedures during installation, removal, and maintenance operations.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43685532336218,"sku":"1771-OBDS\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-OAD1.jpg?v=1784617761","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-obds-b-digital-dc-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}