{"product_id":"allen-bradley-1771-ir-plc-5-series-rtd-input-module","title":"Allen-Bradley 1771-IR PLC-5 Series RTD Input Module","description":"\u003cp\u003eConfigured for precision temperature measurement in 1771 chassis systems, the \u003cstrong\u003eAllen-Bradley 1771-IR\u003c\/strong\u003e (\u003cstrong\u003e1771IR\u003c\/strong\u003e RTD Input Module) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eHardware Revision \u0026amp; Series Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771-IR\u003c\/strong\u003e: Base catalog number specifying the 6-channel 3-wire RTD analog input module for PLC-5 systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771-IR\/A to 1771-IR\/D\u003c\/strong\u003e: Revision level designations (Series A through D) reflecting incremental hardware layout updates while maintaining terminal pinout backward compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Parameters \u0026amp; Operational Limits\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-IR\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\u003e0.64 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.0 x 14.5 x 25.3 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\u003e4.75 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e6 Points (3-Wire RTD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eRTD Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e0.950 A at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical DC Signal Delay (Off)\u003c\/td\u003e\n\u003ctd\u003e50 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eChassis Rack Mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eArchitecture \u0026amp; Backplane Bus Integration\u003c\/h3\u003e\n\u003cp\u003eThe assembly processes resistance temperature detector signals across 6 dedicated channels, transferring digitized temperature data via backplane bus communication velocity routines to the processor. High channel-to-backplane isolation prevents field noise coupling into internal logic circuits. The module design maintains firmware flash compatibility across host PLC-5 racks to optimize I\/O density scaling without inducing backplane buffer overruns during cyclic scan executions.\u003c\/p\u003e\n\u003ch3\u003ePackage Component Checklist\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1771-IR RTD Input Module\u003c\/li\u003e\n\u003cli\u003e1 x Field Wiring Arm Alignment Keying Clip\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Installation \u0026amp; Wiring Guidelines\u003c\/h3\u003e\n\u003ch4\u003eChassis Insertion Steps\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInsert plastic keying bands into the chassis backplane connector at designated pin locations to enforce slot alignment.\u003c\/li\u003e\n\u003cli\u003eAlign top and bottom circuit board edges with chassis card guides, pushing firmly until the rear connector latches into the backplane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCable Routing and Shielding\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eWire 3-wire RTD sensors using individually shielded, twisted-triad copper conductors.\u003c\/li\u003e\n\u003cli\u003eConnect the shield drain wire to frame ground at a single chassis terminal to eliminate ground loop current paths.\u003c\/li\u003e\n\u003cli\u003eMaintain at least 30 cm clearance between RTD signal cables and high-voltage AC power distribution wiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Operational FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat sensor type connects to the 1771-IR module?\u003c\/p\u003e\n\u003cp\u003eThe module interfaces directly with 6 independent 3-wire resistance temperature detectors (RTDs) for thermal measurement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat current does the 1771-IR draw from the chassis backplane?\u003c\/p\u003e\n\u003cp\u003eThe internal logic circuitry draws a continuous current load of 0.950 A at 5 VDC from the 1771 backplane bus supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs hot-swapping allowed for this module during rack operation?\u003c\/p\u003e\n\u003cp\u003eNo. System power to the 1771 chassis must be fully turned off before inserting or removing the card to protect backplane pins.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the typical DC signal turn-off delay for the input channels?\u003c\/p\u003e\n\u003cp\u003eThe module exhibits a typical DC signal delay (off time) of 50 ms across its input filtering circuitry.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are lead resistance variances balanced across 3-wire RTD inputs?\u003c\/p\u003e\n\u003cp\u003eThe 3-wire input configuration automatically cancels equal lead wire resistances across the sensor connections to preserve accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire gauge size is compatible with the field wiring arm?\u003c\/p\u003e\n\u003cp\u003eThe field wiring arm terminals accept solid or stranded copper wire sizes ranging from 14 AWG to 22 AWG.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the total power dissipation rating of the module?\u003c\/p\u003e\n\u003cp\u003eThe module dissipates up to 4.75 W of electrical power during normal continuous operation within a 1771 chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo spare designations like 1771-IR\/A or 1771-IR\/B replace the base unit?\u003c\/p\u003e\n\u003cp\u003eYes. Series designations A, B, C, and D represent compatible hardware revision levels for the base 1771-IR catalog module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066443583661,"sku":"1771-IR","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1771-ir.jpg?v=1786891198","url":"https:\/\/www.maxwellplc.com\/ru\/products\/allen-bradley-1771-ir-plc-5-series-rtd-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}