{"product_id":"allen-bradley-1762-ir4-rtd-resistance-module","title":"Allen Bradley 1762-IR4 RTD\/Resistance Module","description":"\u003ch2\u003eAllen‑Bradley 1762‑IR4 RTD\/Resistance Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen‑Bradley 1762‑IR4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1762‑IR4\u003c\/strong\u003e RTD\/resistance input module, serves as the primary 4‑channel measurement interface used to execute low‑level RTD and resistive sensing across MicroLogix platforms.\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\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e1762‑IR4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAllen‑Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003e40 mA @ 5 VDC, 50 mA @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eRTD\/Resistance Input Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eMicroLogix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Channels\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccepted Inputs\u003c\/th\u003e\n\u003ctd\u003ePt385, Pt3916, Cu426, Ni672, Ni618, Ni‑Fe518\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResistance Range\u003c\/th\u003e\n\u003ctd\u003e0–3000 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter Frequency\u003c\/th\u003e\n\u003ctd\u003e10 Hz–1 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Units\u003c\/th\u003e\n\u003ctd\u003edeg C or deg F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eData Formats\u003c\/th\u003e\n\u003ctd\u003eRaw, Proportional, Engineering Units, EU×10, Scaled‑for‑PID, Percent Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy (25 deg C)\u003c\/th\u003e\n\u003ctd\u003eRTD ±0.2…±0.6 deg C; Resistance ±0.5…±1.5 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy (0–55 deg C)\u003c\/th\u003e\n\u003ctd\u003eRTD ±0.4…±1.1 deg C; Resistance ±0.25…±2.5 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChannel Update Time\u003c\/th\u003e\n\u003ctd\u003e6–303 ms (filter‑dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet\/IP Deterministic Networks\u003c\/h3\u003e\n\u003cp\u003eAlthough the 1762‑IR4 is an analog module, its sampling behavior aligns with Allen‑Bradley’s deterministic backplane timing. Channel update intervals (6–303 ms) integrate into fixed scan‑cycle propagation defined by the MicroLogix controller. I\/O density scaling ensures that multiple analog modules maintain uniform timing without cross‑channel interference. Firmware flash compatibility resides entirely within the controller; the IR4 contains no programmable logic and provides stable, passive measurement behavior across firmware revisions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1762‑IR4 be hot‑swapped? A: No. MicroLogix modules must be inserted or removed only when the system is de‑energized.\u003c\/p\u003e\n\u003cp\u003eQ: Does filter frequency affect update time? A: Yes. Higher filter frequencies reduce update time, while lower frequencies increase noise suppression.\u003c\/p\u003e\n\u003cp\u003eQ: Are RTD and resistance channels isolated from each other? A: Channels are independently processed, but isolation is not channel‑to‑channel; wiring practices must prevent cross‑coupling.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRoute RTD and resistance wiring separately from high‑energy conductors to minimize induced noise.\u003c\/li\u003e\n\u003cli\u003eUse shielded cable for long sensor runs; terminate shields at a single grounding point.\u003c\/li\u003e\n\u003cli\u003eMaintain consistent lead‑wire lengths for RTD circuits to avoid measurement imbalance.\u003c\/li\u003e\n\u003cli\u003eVerify terminal torque to prevent drift caused by loose connections.\u003c\/li\u003e\n\u003cli\u003eAvoid routing sensor wiring near VFD outputs or relay coils.\u003c\/li\u003e\n\u003cli\u003eConfirm correct filter settings in the controller to match process dynamics.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48225571537086,"sku":"1762-IR4","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/allen-bradley-1762-l40bwa-micrologix-1200-40-point-controller-prq5hq1yd2u.png?v=1759044075","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1762-ir4-rtd-resistance-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}