{"product_id":"allen-bradley-1746-nio4v-slc-500-analog-combination-i-o-module","title":"Allen-Bradley 1746-NIO4V SLC 500 Analog Combination I\/O Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1746-NIO4V\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746-NIO4V\u003c\/strong\u003e Analog Combination I\/O Module, operates as a dedicated hardware component for simultaneous analog signal input measurement and voltage output generation within SLC 500 chassis 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-NIO4V\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\u003e0.34 kg (0.75 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\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e2 differential voltage\/current inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Ranges\u003c\/td\u003e\n\u003ctd\u003e-20 to +20 mA (current), -10 to +10 VDC (voltage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resolution\u003c\/td\u003e\n\u003ctd\u003e16-bit (1.22070 uA\/LSB current, 305.176 uV\/LSB voltage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e2 non-isolated voltage outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Range\u003c\/td\u003e\n\u003ctd\u003e-10 to +10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Resolution\u003c\/td\u003e\n\u003ctd\u003e14-bit (1.22070 mV per LSB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Method\u003c\/td\u003e\n\u003ctd\u003eSigma-delta modulation (inputs), R-2R ladder (outputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e60 ms (inputs), 2.5 ms (outputs at 95%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField-to-Backplane Isolation\u003c\/td\u003e\n\u003ctd\u003e500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e55 mA at 5.1 VDC, 115 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Location\u003c\/td\u003e\n\u003ctd\u003eAny chassis 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-NIO4V executes high-speed signal conversion using 16-bit input sigma-delta modulation and 14-bit output R-2R ladder D\/A conversion, continuously updating data tables over the SLC backplane bus. The module leverages internal firmware flash compatibility to process differential input channels and output loops simultaneously with a 512-microsecond update time and 10 Hz bandwidth. Backplane bus communication velocity guarantees low-latency signal throughput, enabling compact, high-density analog control loops without degrading cyclic CPU execution speed.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What input impedance and overvoltage limits apply to the 1746-NIO4V input channels?\u003c\/p\u003e\n\u003cp\u003eA: Current input channels present a nominal impedance of 250 Ohms, while voltage input channels feature a high 1 Mohm input impedance. Input terminals incorporate overvoltage protection up to 220 VAC or 220 VDC.\u003c\/p\u003e\n\u003cp\u003eQ: Are the output channels on the 1746-NIO4V individually isolated from each other?\u003c\/p\u003e\n\u003cp\u003eA: No, the 2 analog voltage output channels are non-isolated from one another. However, the module provides 500 VDC isolation between field wiring and the SLC backplane bus.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1746-NIO4V module be located in Slot 0 of an SLC 500 chassis?\u003c\/p\u003e\n\u003cp\u003eA: No, Slot 0 is strictly designated for the primary CPU processor module. The 1746-NIO4V can be installed in any available I\/O expansion slot within the local chassis.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eTurn off all main electrical power to the SLC 500 chassis before inserting or removing the 1746-NIO4V module. Check the backplane card edge connectors and slot guide rails to ensure smooth alignment without bending backplane pins.\u003c\/p\u003e\n\u003cp\u003eConnect field instrumentation signals using recommended Belden 8761 shielded 2-conductor cable (14 AWG max wire size). Route low-level analog signal cables away from AC power lines, high-current switching devices, and motor drive conduits. Terminate cable shielding drain wires strictly at a single enclosure earth ground connection to prevent electrical noise coupling and ground loops across the analog loops.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48791576707262,"sku":"1746-NIO4V","price":96.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1746-NIO4V_2_bdf213a0-8f9d-4964-b158-4f41f88c723b.png?v=1787819250","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1746-nio4v-slc-500-analog-combination-i-o-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}