{"product_id":"allen-bradley-1746-nr4-slc-500-rtd-input-module","title":"Allen-Bradley 1746-NR4 SLC 500 RTD Input Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-NR4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a four-channel RTD and resistance input module designed for the SLC 500 programmable controller platform. This analog input module supports direct connection of multiple RTD sensor types and resistance-based measurement devices, providing accurate temperature and resistance monitoring in industrial control systems.\u003c\/p\u003e\n\u003cp\u003eEngineered for compatibility with both fixed and modular SLC 500 chassis configurations, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-NR4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivers high-resolution analog acquisition using sigma-delta A\/D conversion technology. The module is suitable for applications requiring stable temperature measurement, sensor monitoring, and process feedback in manufacturing and process automation environments.\u003c\/p\u003e\n\u003cp\u003eThe module supports a wide range of RTD sensor standards including platinum, nickel, copper, and nickel-iron elements. Flexible resistance input ranges allow integration with custom resistive sensing devices and instrumentation circuits.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Number\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1746-NR4\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRTD \/ Resistance Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e4 Analog Inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Type\u003c\/td\u003e\n\u003ctd\u003eRTD and Resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported RTD Types\u003c\/td\u003e\n\u003ctd\u003ePlatinum 385, Platinum 3916, Copper 426, Nickel 618, Nickel 672, Nickel-Iron 518\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported RTD Values\u003c\/td\u003e\n\u003ctd\u003e10 Ω, 100 Ω, 120 Ω, 200 Ω, 500 Ω, 604 Ω, 1000 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance Input Ranges\u003c\/td\u003e\n\u003ctd\u003e0–150 Ω, 0–300 Ω, 0–500 Ω, 0–1000 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Method\u003c\/td\u003e\n\u003ctd\u003eSigma-Delta Modulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Resolution\u003c\/td\u003e\n\u003ctd\u003e0.01°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth Range\u003c\/td\u003e\n\u003ctd\u003e2.62 Hz to 65.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Update Time\u003c\/td\u003e\n\u003ctd\u003e17 ms to 1.2 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e60 ms Input \/ 2.5 ms Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W Maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5V DC Backplane Load\u003c\/td\u003e\n\u003ctd\u003e0.3 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24V DC Backplane Load\u003c\/td\u003e\n\u003ctd\u003e1.2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Rating\u003c\/td\u003e\n\u003ctd\u003e500 V for 1 Minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chassis\u003c\/td\u003e\n\u003ctd\u003eFixed and Modular SLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Installation\u003c\/td\u003e\n\u003ctd\u003eAny Slot Except Slot 0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to 85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate Weight\u003c\/td\u003e\n\u003ctd\u003e0.26 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Category\u003c\/td\u003e\n\u003ctd\u003ePLC Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eSupported Sensor Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-NR4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esupports several industry-standard RTD sensor types commonly used in process instrumentation:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003ePlatinum RTD (α = 0.00385)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlatinum RTD (α = 0.003916)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCopper RTD\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNickel RTD\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNickel-Iron RTD\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis flexibility simplifies integration into existing temperature control systems without requiring additional signal converters.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Functional Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eFour isolated RTD\/resistance input channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-accuracy temperature measurement capability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDirect connection for RTD sensors without external transmitters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with multiple resistance ranges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConfigurable filtering and bandwidth settings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports modular and fixed SLC 500 hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSigma-delta conversion improves noise rejection performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact rack-mounted SLC 500 module design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eIndustrial temperature monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProcess heating and cooling systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHVAC automation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFurnace and oven control\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eChemical processing equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFood and beverage production\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWater treatment facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMachine condition monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat sensors are compatible with the 1746-NR4?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe module supports platinum, nickel, copper, and nickel-iron RTD sensors, along with direct resistance input devices.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCan the 1746-NR4 be installed in any SLC 500 slot?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe module can be installed in any available chassis slot except Slot 0.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDoes the module support direct resistance measurement?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eYes. In addition to RTD sensors, the module accepts several direct resistance input ranges up to 1000 Ω.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat type of analog conversion does the module use?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-NR4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003euses sigma-delta A\/D conversion for stable and accurate analog signal processing.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43332893540442,"sku":"1746-NR4","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-NR42.jpg?v=1778206419","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-nr4-slc-500-rtd-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}