{"product_id":"allen-bradley-1771-ir-rtd-input-module","title":"Allen-Bradley 1771-IR RTD Input Module","description":"\u003cp\u003eConfigured for resistance temperature detector measurement in Allen-Bradley PLC platforms, the \u003cstrong\u003eAllen-Bradley 1771-IR\u003c\/strong\u003e (\u003cstrong\u003e1771-IR\u003c\/strong\u003e RTD Input Module) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1771\u003c\/strong\u003e: Universal I\/O chassis-based hardware architecture for Allen-Bradley control systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\u003c\/strong\u003e: Input module function designation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e: Resistance Temperature Detector (RTD) channel sensor interface configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\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\u003e1.88 lbs (0.85 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1771 single-slot chassis module\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 (16.2 BTU\/hr thermal dissipation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e800 mA nominal (950 mA maximum at 5 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e6 three-wire RTD inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Sensors\u003c\/td\u003e\n\u003ctd\u003e100 Ohm Platinum, 10 Ohm Copper, Nickel\/Iron sensors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16 bits + sign (0.1 deg C \/ 0.1 deg F or 0.01 Ohm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WF (or 1771-WH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHigh-Density Analog Processing and Backplane Determinism\u003c\/h3\u003e\n\u003cp\u003eThe 1771-IR digitizes resistance values from three-wire RTD sensors, converting temperature metrics directly into Natural Binary, BCD, or direct Ohm data formats. Integrated into ControlNet or EtherNet\/IP deterministic remote I\/O link architectures, the internal analog front-end incorporates open-wire lead detection while isolating field sensor noise to preserve backplane bus communication velocity across adjacent PLC-5 chassis submodules.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1771-IR RTD input module require an external power supply?\u003c\/p\u003e\n\u003cp\u003eA: No external power supply is needed; the 1771-IR derives all logic and signal excitation power directly from the 1771 chassis 5 VDC backplane bus.\u003c\/p\u003e\n\u003cp\u003eQ: What keying position is required on the 1771 chassis slot backplane for the 1771-IR module?\u003c\/p\u003e\n\u003cp\u003eA: Keying bands must be installed on the chassis backplane connector between pins 10 and 12, or between pins 28 and 30.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eTurn off 1771 chassis backplane supply power prior to inserting or removing the 1771-IR module from the rack slot.\u003c\/li\u003e\n\u003cli\u003eConnect 3-wire RTD sensor conductors to the 1771-WF swing arm, ensuring matching lead lengths to maintain lead-wire resistance compensation balance.\u003c\/li\u003e\n\u003cli\u003eRoute RTD field signal cables in dedicated shielded twisted-pair conduits away from high-voltage AC motor drives and switching power sources.\u003c\/li\u003e\n\u003cli\u003eEarth ground cable shields at a single ground point at the panel side to eliminate ground loop noise coupling across low-resistance sensor channels.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48779949342910,"sku":"1771-IR","price":93.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1771-OVN_d5f1ed14-f8c0-4878-8c3f-75e025d094a2.png?v=1787541653","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1771-ir-rtd-input-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}