{"product_id":"allen-bradley-1771-im-ac-input-module","title":"Allen-Bradley 1771-IM AC Input Module","description":"\u003ch2\u003eAllen-Bradley 1771-IM AC Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-IM\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-IM\u003c\/strong\u003e AC Input Module, operates as a dedicated hardware component for AC field signal acquisition within PLC-5 I\/O chassis platforms. It provides 32-point AC input monitoring with optically isolated channels, input filtering, and LED status indication for discrete signal processing.\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-IM\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eAC Digital Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003ePLC-5 1771 I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e32 AC input points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e85-138 VAC or 170-265 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Frequency\u003c\/td\u003e\n\u003ctd\u003e47-63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003eApprox. 10 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eOptoelectrical isolation between field inputs and backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e10-17 ms typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e250 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.08 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e237.5 x 183 x 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0-60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRack mount, 1 slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003ePLC-5 processors and 1771 I\/O chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 AC Input Signal Processing\u003c\/h3\u003e\n\u003cp\u003eThe 1771-IM module provides discrete AC signal conversion for PLC-5 control systems. The input circuitry supports AC field devices including switches, relays, and sensors. Each channel includes LED indication for input state monitoring and optoelectrical isolation for separation between field wiring and the PLC backplane interface.\u003c\/p\u003e\n\u003cp\u003eFor Allen-Bradley PLC-5 architectures, the module uses deterministic I\/O density scaling through the 1771 rack backplane. The fixed channel structure allows integration with existing PLC-5 chassis configurations while maintaining block-oriented data exchange between the controller and I\/O assembly.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of field signals can the 1771-IM process?\u003cbr\u003eA: The module processes discrete AC input signals within the specified 85-138 VAC and 170-265 VAC operating ranges.\u003c\/p\u003e\n\u003cp\u003eQ: How is field-side electrical separation implemented?\u003cbr\u003eA: The module uses optoelectrical isolation between the AC input channels and the PLC-5 backplane interface.\u003c\/p\u003e\n\u003cp\u003eQ: What chassis systems are compatible with the 1771-IM?\u003cbr\u003eA: The module is designed for installation in Allen-Bradley 1771 I\/O chassis used with PLC-5 processors.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-IM module in a compatible 1771 I\/O chassis slot and secure the module according to rack mounting procedures. Connect field wiring through the specified 1771-WJ wiring arm.\u003c\/p\u003e\n\u003cp\u003eSeparate AC field signal wiring from low-level analog or communication cables to reduce electrical interference. Use appropriate grounding practices for enclosure shielding and maintain clear routing between power conductors and control signal wiring.\u003c\/p\u003e\n\u003cp\u003eVerify input voltage levels before connection and confirm LED channel indication after installation. Follow PLC-5 system grounding and wiring documentation when integrating the module into an existing control cabinet.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43681470709850,"sku":"1771-IM","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-IM2.jpg?v=1784532350","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-im-ac-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}