{"product_id":"allen-bradley-1771-ibd-b-digital-dc-input-module","title":"Allen-Bradley 1771-IBD\/B Digital DC Input Module","description":"\u003ch2\u003eAllen-Bradley 1771-IBD\/B Digital DC Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-IBD\/B\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-IBD\u003c\/strong\u003e Digital DC Input Module, operates as a dedicated hardware component for discrete signal acquisition within PLC-5 control systems. It receives 10-30 VDC sinking input signals from field devices and transfers status data through the 1771 I\/O chassis backplane.\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-IBD\/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\u003e0.25 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e237.5 mm x 183 mm x 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.0-7.3 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e1771 Series \/ PLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDigital DC Input Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 sinking DC inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Voltage\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;=10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Voltage\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;=5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e4.5 mA at 10 VDC; 15 mA at 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;=2.0 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e1 ms OFF-to-ON; 1 ms or 6 ms ON-to-OFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e130 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e2.2 kOhm maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Type\u003c\/td\u003e\n\u003ctd\u003eOptoelectrical isolation with input filtering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAddressing Modes\u003c\/td\u003e\n\u003ctd\u003e1\/2 slot, 1 slot, and 2 slot addressing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chassis\u003c\/td\u003e\n\u003ctd\u003e1771 I\/O chassis except 1771-A1, 1771-A2, and 1771-A4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP and PLC Backplane Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1771-IBD\/B is designed for PLC-5 rack-based I\/O architectures and communicates discrete input states through the 1771 backplane interface. The module provides optoelectrical isolation between field input circuits and the controller-side interface, with integrated filtering for electrical noise reduction.\u003c\/p\u003e\n\u003cp\u003eThe Allen-Bradley 1771 platform supports modular I\/O density scaling through chassis expansion and deterministic backplane data exchange. The 1771-IBD\/B requires a compatible PLC-5 rack configuration and supports LED channel indicators for direct input state observation during system diagnostics.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of field signals can the 1771-IBD\/B accept?\u003cbr\u003eA: The module accepts 10-30 VDC sinking input signals from compatible switches, sensors, and pushbutton devices.\u003c\/p\u003e\n\u003cp\u003eQ: What backplane power requirement does the 1771-IBD\/B have?\u003cbr\u003eA: The module requires 130 mA from the 5 VDC backplane supply.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1771-IBD\/B provide electrical isolation between field wiring and the PLC backplane?\u003cbr\u003eA: Yes. The module uses optoelectrical isolation with input filtering between field input circuits and the controller interface.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-IBD\/B into a compatible 1771 I\/O chassis slot and verify module keying, connector alignment, and wiring arm installation before applying power. Confirm field device polarity and DC voltage levels before connecting input terminals.\u003c\/p\u003e\n\u003cp\u003eRoute low-level DC signal wiring separately from high-voltage power conductors to reduce electromagnetic interference. Maintain proper panel grounding and ensure the chassis grounding system is connected according to industrial control installation practices.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43681222852698,"sku":"1771-IBD\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-IBD_B_1.jpg?v=1784526091","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-ibd-b-digital-dc-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}