{"product_id":"allen-bradley-1771-im-discrete-input-module","title":"Allen-Bradley 1771-IM Discrete Input Module","description":"\u003cp\u003eThe \u003cstrong\u003e1771-IM \u003c\/strong\u003eis a high-voltage discrete AC\/DC input module engineered for the Allen-Bradley PLC-5 system architecture. It interfaces high-voltage field sensing devices—such as limit switches, pushbuttons, and selector switches—to the controller's logic level by converting incoming 220\/240 V signals into digital status data. Featuring 8 discrete input channels, the module draws 75 mA of current directly from the 1771 I\/O chassis backplane.\u003c\/p\u003e\n\u003ch3\u003eSignal Processing and System Interface\u003c\/h3\u003e\n\u003cp\u003eThe module processes high-voltage AC or DC control signals, converting line-level voltages into internal logic signals sent across the backplane to the main PLC-5 processor. Each of the 8 channels is opto-isolated to shield sensitive backplane electronics from field electrical noise, high-voltage spikes, and ground loops. Status indicators on the module front panel provide real-time visual verification of individual channel states, simplifying field diagnostics. \u003c\/p\u003e\n\u003ch3\u003eField Wiring and Chassis Integration\u003c\/h3\u003e\n\u003cp\u003eField wiring connects via a removable 1771-WA wiring arm, enabling module installation or replacement without disconnecting individual field leads. Occupying a single slot in any standard 1771 I\/O chassis, the module features mechanical keying slots on its rear circuit card to prevent accidental insertion into slots configured for incorrect voltage levels.\u003c\/p\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-IM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDiscrete Input Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Platform\u003c\/td\u003e\n\u003ctd\u003ePLC-5 \/ 1771 I\/O System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e220\/240 VAC\/VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Consumption\u003c\/td\u003e\n\u003ctd\u003e75 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle Slot Weight\u003c\/td\u003e\n\u003ctd\u003e1.08 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Wiring Connector\u003c\/td\u003e\n\u003ctd\u003e1771-WA Wiring Arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1771-IM module accept direct DC inputs as well as AC inputs? A: Yes, the module is rated for 220\/240 V AC\/DC line-level field inputs, accepting high-voltage signals from both AC control circuits and direct-current field devices.\u003c\/p\u003e\n\u003cp\u003eQ: Is it necessary to disconnect field wiring when swapping a damaged 1771-IM module? A: No, the module utilizes a swing-arm style 1771-WA field wiring connector that latches into the chassis, allowing the module to be unplugged and replaced without rewiring individual terminal connections.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67124509409395,"sku":"1771-IM","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1771-IM_Cocoai_57a1adec-077c-446e-afa4-ae8299606d7c.jpg?v=1793949503","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-1771-im-discrete-input-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}