{"product_id":"1746-nr8-1746nr8-allen-bradley-slc-500-slc-8-point-resistance-input-module","title":"1746-NR8 1746NR8 Allen-Bradley SLC 500 SLC 8 Point Resistance Input Module","description":"\u003cp\u003eConfigured for precision analog signal acquisition in industrial automation frameworks, the \u003cstrong\u003eAllen-Bradley 1746-NR8 1746NR8\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746-NR8\u003c\/strong\u003e SLC 8 Point Resistance Input Module, provides direct physical and electrical execution for measuring multi-channel resistance and RTD inputs across controller chassis racks.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eComponent Level\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eIdentifier\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003ctd\u003eManufacturer entity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003ctd\u003eModular controller platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003e1746-NR8\u003c\/td\u003e\n\u003ctd\u003eResistance Input Module designation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpare Part Number\u003c\/td\u003e\n\u003ctd\u003e1746NR8\u003c\/td\u003e\n\u003ctd\u003eFactory catalog reference ID\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003e1746-NR8 1746NR8\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\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.6 cm x 13.0 cm x 14.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C (32 deg F to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.82 W maximum (0.5 W at 5 VDC, 1.32 W at 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e100 mA at 5 VDC, 55 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e8 resistance input channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus \u0026amp; Network Communication Parameters\u003c\/h3\u003e\n\u003cp\u003eThe hardware utilizes backplane bus communication velocity licences to maintain deterministic polling rates across analog input channels. I\/O density scaling capabilities allow operators to expand measurement arrays across backplane slots without violating bus timing constraints or update intervals. Firmware flash compatibility ensures that low-level communication protocol stacks remain synchronized with controller processors during active process monitoring.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents \u0026amp; Ordering Info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1746-NR8 Resistance Input Module (Part Number: 1746NR8)\u003c\/li\u003e\n\u003cli\u003e1 x Removable Terminal Block (RTB) Connector\u003c\/li\u003e\n\u003cli\u003e1 x Technical Compliance Documentation Leaflet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure chassis power is completely removed before inserting or extracting the input module from the backplane rack.\u003c\/li\u003e\n\u003cli\u003eMount the module into any available I\/O slot except Slot 0, ensuring proper alignment with backplane guide rails.\u003c\/li\u003e\n\u003cli\u003eConnect field signal wiring to the removable terminal block, maintaining proper shielding for low-level resistance measurements.\u003c\/li\u003e\n\u003cli\u003eRoute analog sensor cables away from high-voltage power lines and variable frequency drives to minimize electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQ: What is the primary operational function of this module within the control system?\u003c\/li\u003e\n\u003cli\u003eA: It measures multi-channel resistance and RTD signals from field sensors and converts them into digital values for the controller.\u003c\/li\u003e\n\u003cli\u003eQ: Can this input module be installed in Slot 0 of the SLC 500 chassis?\u003c\/li\u003e\n\u003cli\u003eA: No, Slot 0 is reserved for the processor unit; this module can occupy any other available I\/O slot.\u003c\/li\u003e\n\u003cli\u003eQ: What is the power consumption profile of the hardware?\u003c\/li\u003e\n\u003cli\u003eA: The unit consumes a maximum of 1.82 W, drawing 100 mA from the 5 VDC backplane and 55 mA from the 24 VDC supply.\u003c\/li\u003e\n\u003cli\u003eQ: What step response time is specified for the input channels?\u003c\/li\u003e\n\u003cli\u003eA: The module features a step response time of 60 milliseconds for inputs and 2.5 milliseconds for outputs.\u003c\/li\u003e\n\u003cli\u003eQ: What operational temperature range is supported by the device?\u003c\/li\u003e\n\u003cli\u003eA: The hardware functions reliably within an ambient operating temperature range of 0 deg C to +60 deg C.\u003c\/li\u003e\n\u003cli\u003eQ: Does this module support live insertion and removal (hot-swapping)?\u003c\/li\u003e\n\u003cli\u003eA: No, power to the chassis must be switched off prior to installing or removing the module from the backplane.\u003c\/li\u003e\n\u003cli\u003eQ: Why is proper shielding required for field wiring?\u003c\/li\u003e\n\u003cli\u003eA: Shielding prevents high-frequency electrical noise from corrupting sensitive resistance and temperature measurement signals.\u003c\/li\u003e\n\u003cli\u003eQ: What maintenance procedures are recommended for this unit?\u003c\/li\u003e\n\u003cli\u003eA: Periodically inspect terminal block connections for secure torque and ensure ventilation around the chassis remains clear.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066407375021,"sku":"1746-NR8","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1746-NR83.jpg?v=1785148679","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1746-nr8-1746nr8-allen-bradley-slc-500-slc-8-point-resistance-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}