{"product_id":"allen-bradley-1771-ian-plc-5-series-digital-input-module","title":"Allen-Bradley 1771-IAN PLC-5 Series Digital Input Module","description":"\u003cp\u003eConfigured for discrete AC voltage signal sensing in PLC-5 I\/O chassis architecture, the \u003cstrong\u003eAllen-Bradley 1771-IAN\u003c\/strong\u003e (\u003cstrong\u003e1771IAN\u003c\/strong\u003e Digital Input Module) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eModule Configuration \u0026amp; Variants\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771-IAN\u003c\/strong\u003e: High-density 32-point AC digital input module operating at 85-138 VAC (50\/60 Hz) nominal voltage logic levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771IAN\u003c\/strong\u003e: Functional catalog designation denoting the 32-channel discrete input assembly for 1771 universal I\/O backplane slots.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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-IAN\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg (1 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e2.5 cm x 25.4 cm x 15.2 cm\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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.25 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003e32 Points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003e85-138 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e250 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Bus \u0026amp; Signal Scaling\u003c\/h3\u003e\n\u003cp\u003eThe unit processes discrete field signals across 32 individual channels, transferring state data through the 1771 backplane bus communication velocity architecture. Internal optocouplers isolate high-voltage AC field circuits from backplane logic processing. Firmware flash compatibility ensures synchronized scan times with PLC-5 processors, maintaining I\/O density scaling across large I\/O racks without dropouts.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1771-IAN Digital Input Module\u003c\/li\u003e\n\u003cli\u003e1 x Field Wiring Arm Alignment Keying Band\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePanel Mounting \u0026amp; Wiring Protocols\u003c\/h3\u003e\n\u003ch4\u003eChassis Insertion and Keying\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInsert keying bands into the 1771 I\/O chassis backplane connector between pins 10-12 and 18-20 to prevent incorrect module substitution.\u003c\/li\u003e\n\u003cli\u003eSlide the module firmly into the chassis slot until the top and bottom retaining latches snap into position.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWiring Routing and Grounding\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRoute AC input conductors separately from low-level DC analog lines to prevent electromagnetic crosstalk.\u003c\/li\u003e\n\u003cli\u003eConnect field signal wiring to the 1771-WN field wiring arm, ensuring screw terminals are torqued to 0.9 Nm (8 lb-in).\u003c\/li\u003e\n\u003cli\u003eGround the 1771 chassis frame directly to the panel enclosure ground bus using heavy gauge copper grounding wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Operational FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the nominal operating input voltage range for the 1771-IAN?\u003c\/p\u003e\n\u003cp\u003eThe module accepts input signal levels ranging from 85 to 138 VAC at a frequency of 50\/60 Hz.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow much current does the module draw from the 1771 backplane?\u003c\/p\u003e\n\u003cp\u003eThe internal logic circuits draw a maximum of 250 mA at 5 VDC directly from the backplane power supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module support hot-swapping in an energized 1771 chassis?\u003c\/p\u003e\n\u003cp\u003eRemoval or insertion under backplane power is not recommended and can cause processor fault conditions or contact arc.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat signal isolation is provided between field terminals and logic?\u003c\/p\u003e\n\u003cp\u003eOptocouplers provide galvanic isolation up to 1500 VAC between field input terminals and the backplane logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are the 32 input channels grouped on the field wiring arm?\u003c\/p\u003e\n\u003cp\u003eThe 32 input points are arranged in four isolated groups of eight channels each with dedicated common connections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if an input voltage falls below 35 VAC?\u003c\/p\u003e\n\u003cp\u003eAn input voltage below 35 VAC is recognized as a logic low (OFF) state by the internal input detection circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAre status indicators provided on the front panel for troubleshooting?\u003c\/p\u003e\n\u003cp\u003eYes, individual active LED status indicators display the real-time ON\/OFF state for each of the 32 input points.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire gauge should be used with the field wiring arm?\u003c\/p\u003e\n\u003cp\u003eThe field wiring arm terminals accept solid or stranded copper conductors ranging from 14 AWG to 22 AWG.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066443354285,"sku":"1771-IAN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1771-ian_1.jpg?v=1786976504","url":"https:\/\/www.maxwellplc.com\/ru\/products\/allen-bradley-1771-ian-plc-5-series-digital-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}