{"product_id":"allen-bradley-1746-nr4-slc-500-rtd-resistance-analog-input-module","title":"Allen-Bradley 1746-NR4 SLC 500 RTD\/Resistance Analog Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1746-NR4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746-NR4\u003c\/strong\u003e RTD\/Resistance Analog Input Module, operates as a dedicated hardware component for direct thermal sensor signal acquisition and resistance measurement within SLC 500 rack assemblies.\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\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1746-NR4\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\u003e0.23 kg (0.50 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eSingle-slot SLC 500 chassis footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eStandard backplane power draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Inputs\u003c\/td\u003e\n\u003ctd\u003e4 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eRTD \/ Resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e50 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Frequency\u003c\/td\u003e\n\u003ctd\u003e2.62 to 65.5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C (-40 to 185 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Location\u003c\/td\u003e\n\u003ctd\u003eAny slot except Slot 0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Backplane \u0026amp; I\/O Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe 1746-NR4 translates raw field signals from resistance temperature detectors into processed digital formats for transfer across the internal SLC 500 backplane. Built-in digital filtering (2.62 to 65.5 Hz) suppresses industrial electrical noise while preserving fast analog-to-digital update execution. High firmware flash compatibility ensures real-time scaling and linearization of process variables, maintaining low latency and stable I\/O density scaling across expanded multi-chassis architectures.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-NR4 module be positioned in Slot 0 of an SLC 500 rack?\u003c\/p\u003e\n\u003cp\u003eA: No, Slot 0 is strictly designated for the SLC 500 system CPU processor. The 1746-NR4 can be placed in any remaining open slot in the local chassis.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane current draw for the 1746-NR4 module?\u003c\/p\u003e\n\u003cp\u003eA: The module draws 50 mA from the 5 VDC backplane rail, which must be factored into system power supply sizing calculations.\u003c\/p\u003e\n\u003cp\u003eQ: How does the configurable filtering frequency range impact signal processing?\u003c\/p\u003e\n\u003cp\u003eA: The adjustable 2.62 to 65.5 Hz filter allows operators to trade off response time against noise immunity, eliminating line-frequency interference in high-noise electrical environments.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eAlways disconnect power to the SLC 500 chassis before inserting or removing the 1746-NR4 card edge connector. Verify physical keying on the chassis slot to prevent backplane bus pin bending during installation.\u003c\/p\u003e\n\u003cp\u003eUse twisted-pair, overall shielded instrument cable (such as Belden 9501 for 2-wire RTDs or Belden 9533 for 3-wire\/4-wire configurations) for field wiring. Land cable shields strictly at a single enclosure protective earth ground bus to prevent ground loop noise. Keep low-level RTD wiring physically isolated from high-voltage AC conductors and motor drive outputs within wire duct runs.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48791574544574,"sku":"1746-NR4","price":96.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1746-NIO4V_2_657ba52d-1d9e-464d-89f6-f2ae3375066d.png?v=1787819244","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1746-nr4-slc-500-rtd-resistance-analog-input-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}