{"product_id":"allen-bradley-1771-nis-plc-5-current-input-module","title":"Allen-Bradley 1771-NIS PLC-5 Current Input Module","description":"\u003ch2\u003eAllen-Bradley 1771-NIS PLC-5 Current Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for isolated 4-20 mA transmitter signal acquisition in PLC-5 systems, the \u003cstrong\u003eAllen-Bradley 1771-NIS\u003c\/strong\u003e (\u003cstrong\u003e1771-NIS\u003c\/strong\u003e Current Input Module) provides direct analog current measurement and loop power supply functions through the 1771 I\/O chassis interface.\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-NIS\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCurrent Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Platform\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eN-Series Analog I\/O Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 Inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eCurrent Input, Sinking\/Sourcing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Range\u003c\/td\u003e\n\u003ctd\u003e4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resolution\u003c\/td\u003e\n\u003ctd\u003e0.34 microamperes\/bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop Power\u003c\/td\u003e\n\u003ctd\u003eSupports loop power for 2-wire transmitters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eBCD or Natural Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eIsolated analog inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e2.9 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTP Choice\u003c\/td\u003e\n\u003ctd\u003e1771-RTP4\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\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRack Mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1 lbs\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\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003eUp to 95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eApprox. 14.5 W at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 Analog Current Signal Processing Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1771-NIS module provides eight isolated analog current input channels for PLC-5 control systems. Each channel accepts 4-20 mA signals from field transmitters and supports loop-powered 2-wire transmitter connections through the module interface.\u003c\/p\u003e\n\u003cp\u003eThe Allen-Bradley PLC-5 analog I\/O architecture uses backplane data exchange for input transfer. The 1771-NIS provides selectable data representation using BCD or Natural Binary formats for PLC processor interpretation.\u003c\/p\u003e\n\u003cp\u003eThe module supports industrial control applications requiring analog input density scaling and isolated current signal acquisition. Firmware compatibility and PLC-5 backplane communication are managed through the standard 1771 I\/O chassis interface.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of field signals can the 1771-NIS measure?\u003cbr\u003eA: The module measures analog current signals in the 4-20 mA range and supports loop-powered 2-wire transmitters.\u003c\/p\u003e\n\u003cp\u003eQ: How many analog input channels are available on the 1771-NIS?\u003cbr\u003eA: The module provides 8 current input channels with isolated analog input processing.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane current requirement of the 1771-NIS?\u003cbr\u003eA: The module requires 2.9 A of backplane current from the PLC-5 chassis supply.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-NIS module only in a compatible Allen-Bradley 1771 I\/O chassis with backplane power removed during module insertion or removal. Verify chassis power capacity before installation due to the module backplane current requirement.\u003c\/p\u003e\n\u003cp\u003eConnect 4-20 mA field wiring according to transmitter polarity and current loop requirements. Maintain separation between analog signal cables and high-voltage power conductors to reduce electrical noise coupling. Use appropriate shielding and grounding practices for analog instrumentation wiring.\u003c\/p\u003e\n\u003cp\u003eConfirm transmitter loop power requirements before connection. Inspect wiring arms and terminal connections for correct mechanical engagement before applying system power.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43681516453978,"sku":"1771-NIS","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-NIS2.jpg?v=1784535370","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-nis-plc-5-current-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}