{"product_id":"allen-bradley-1771-il-isolated-analog-input-module","title":"Allen-Bradley 1771-IL Isolated Analog Input Module","description":"\u003ch2\u003eAllen-Bradley 1771-IL Isolated Analog Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-IL\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-IL\u003c\/strong\u003e Analog Input Module, operates as a dedicated hardware component for isolated analog signal acquisition within PLC-5 I\/O chassis platforms. It provides eight differential input channels with configurable voltage and current ranges and block transfer data exchange.\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-IL\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eIsolated Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e8 isolated differential inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Type\u003c\/td\u003e\n\u003ctd\u003eVoltage and current analog inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e-10 to +10 VDC, -5 to +5 VDC, 0 to 10 VDC, 0 to 5 VDC, 1 to 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Range\u003c\/td\u003e\n\u003ctd\u003e-20 to +20 mA, 0 to 20 mA, 4 to 20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16-bit binary \/ 15 bits plus sign\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Update Rate\u003c\/td\u003e\n\u003ctd\u003e500 ms for 8 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1000 V isolated differential inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eNatural binary or BCD scaling to +\/-9999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eBlock Transfer Instructions (BTW\/BTR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e1.3 A\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\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eRack mount, 1 slot width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WG\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 Analog Signal Isolation and Data Processing\u003c\/h3\u003e\n\u003cp\u003eThe 1771-IL module provides isolated differential analog input processing for PLC-5 control systems. Each channel supports configurable voltage and current measurement ranges, allowing direct connection to analog transmitters and field instruments. The isolated input architecture separates field signal circuits from the PLC backplane interface.\u003c\/p\u003e\n\u003cp\u003eThe module exchanges analog data through PLC-5 block transfer operations using BTW and BTR instructions. The Allen-Bradley PLC-5 backplane communication structure supports deterministic I\/O data handling and analog channel data transfer within rack-based configurations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many analog input channels are available on the 1771-IL module?\u003cbr\u003eA: The 1771-IL provides eight isolated differential analog input channels.\u003c\/p\u003e\n\u003cp\u003eQ: What communication method does the 1771-IL use with PLC-5 processors?\u003cbr\u003eA: The module uses block transfer instructions, including Block Transfer Read (BTR) and Block Transfer Write (BTW), for analog data exchange.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1771-IL require an external power supply?\u003cbr\u003eA: No external field power supply is required according to the provided specifications.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-IL module in a compatible 1771 I\/O chassis slot and verify rack power isolation before installation or removal. Connect analog field wiring through the 1771-WG wiring arm according to channel polarity and signal type requirements.\u003c\/p\u003e\n\u003cp\u003eUse shielded analog cables where applicable and terminate cable shields according to the control system grounding practice. Keep analog signal wiring separated from high-current conductors, motor cables, and switching circuits to reduce electrical noise coupling. Verify voltage and current range configuration before connecting field transmitters\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43681452818522,"sku":"1771-IL","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-IL2.jpg?v=1784531648","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-il-isolated-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}