{"product_id":"1746-nt4-industrial-automation-module-stable-by-allen-bradley","title":"1746-NT4 Industrial Automation Module - Stable by Allen-Bradley","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eWhen precise temperature and millivolt signal acquisition is critical for your SLC 500 control system, the Allen-Bradley 1746-NT4 delivers reliable, high-resolution analog input performance. This Thermocouple\/mV Analog Input Module is engineered to interface directly with the SLC 500 backplane, providing four isolated input channels that accept a wide range of thermocouple types and low-level mV signals. As part of the SLC 500 family, the 1746-NT4 ensures seamless integration and dependable operation in demanding industrial environments.\u003c\/p\u003e\u003cp\u003eThe 1746-NT4 module converts thermocouple or millivolt analog signals into digital data stored in the processor's image table. It receives both 5 VDC and 24 VDC power directly from the SLC 500 chassis backplane, eliminating the need for an external power supply. This design simplifies installation and reduces wiring complexity, making it an ideal choice for both fixed and modular SLC 500 configurations.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eBelow are the key technical parameters for the Allen-Bradley 1746-NT4, sourced directly from the manufacturer's specifications.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\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\u003ePart Number\/Catalog No.\u003c\/td\u003e\n\u003ctd\u003e1746-NT4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eThermocouple\/mV Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003eFour (4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 Volts)\u003c\/td\u003e\n\u003ctd\u003e60 milliamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 Volts)\u003c\/td\u003e\n\u003ctd\u003e55 milliamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Thermocouple Sensors\u003c\/td\u003e\n\u003ctd\u003eJ, K, T, E, S, R, B and N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpdate Time\u003c\/td\u003e\n\u003ctd\u003e26 milliseconds - 1.2 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible millivolt Signal\u003c\/td\u003e\n\u003ctd\u003e±50 mV and ±100 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16 bits in, 14 bits out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e0.06 mA @ 5VDC; 0.04 mA @ 24VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e60 milliseconds in, 2.5 milliseconds out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Power Consumption\u003c\/td\u003e\n\u003ctd\u003e0.8W maximum (0.3W @ 5V dc, 0.5W @ 24V dc)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 backplane isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOpen Circuit Detection\u003c\/td\u003e\n\u003ctd\u003eZero; Upscale; Downscale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e10662468165911\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Chassis Location\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 to 60 degrees Celsius\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degrees Celsius\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA\/D Conversion Method\u003c\/td\u003e\n\u003ctd\u003eSigma-delta modulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Type Thermocouple Support:\u003c\/strong\u003e The 1746-NT4 accepts J, K, T, E, S, R, B, and N thermocouples, offering flexibility across various temperature sensing applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003emV Input Capability:\u003c\/strong\u003e Directly handles ±50 mV and ±100 mV signals, making it suitable for other low-level analog sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Isolation:\u003c\/strong\u003e Each of the four channels is isolated from the backplane, enhancing signal integrity and reducing noise interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Circuit Detection:\u003c\/strong\u003e Configurable zero, upscale, or downscale responses help quickly identify sensor faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-Calibration:\u003c\/strong\u003e The module auto-calibrates at power-up and whenever a channel is enabled, ensuring long-term accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Design:\u003c\/strong\u003e Fits into any SLC 500 chassis slot except Slot 0, simplifying installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1746-NT4 is widely used in process industries where temperature monitoring is essential. Typical applications include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Processing:\u003c\/strong\u003e Monitoring reactor temperatures with J or K thermocouples to ensure safe and efficient reactions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFood \u0026amp; Beverage:\u003c\/strong\u003e Tracking pasteurization and sterilization temperatures using T-type sensors for quality control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHVAC Systems:\u003c\/strong\u003e Measuring air and fluid temperatures in commercial buildings with N-type thermocouples for energy management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetals \u0026amp; Glass:\u003c\/strong\u003e Monitoring high-temperature furnaces with R or S thermocouples to maintain process stability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn each scenario, the 1746-NT4's fast update time and high resolution enable precise control, reducing waste and improving product consistency.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eInstalling the 1746-NT4 is straightforward. Follow these steps for reliable operation:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Slot:\u003c\/strong\u003e Insert the module into any slot except Slot 0 of the SLC 500 chassis. Slot 0 is reserved for the processor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e Use two wires per terminal with a maximum wire size of 2.5 mm² (14 AWG). For thermocouple inputs, shielded twisted thermocouple extension wire is required. For mV inputs, use Belden 8761 or equivalent cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Impedance:\u003c\/strong\u003e Ensure the total cable impedance does not exceed 25 ohms to maintain signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Junction Compensation:\u003c\/strong\u003e The module includes two CJC sensors to automatically compensate for temperature variations at the terminal block, preserving accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Configuration:\u003c\/strong\u003e Configure each channel for the appropriate thermocouple type or mV range using the programming software. The module auto-calibrates upon channel enablement.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eThe 1746-NT4 is designed for long-term reliability in industrial environments. To maximize its service life:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoutine Inspection:\u003c\/strong\u003e Periodically check wiring connections for tightness and signs of corrosion, especially in humid or corrosive atmospheres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleanliness:\u003c\/strong\u003e Keep the module and chassis free of dust and debris to prevent overheating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Limits:\u003c\/strong\u003e Operate within the specified temperature range of 0 to 60°C. Store the module between -40°C and 85°C when not in use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault Monitoring:\u003c\/strong\u003e Monitor the module's status LED and channel LEDs. The open circuit detection feature can alert operators to sensor failures, allowing prompt replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBy adhering to these practices, you can minimize downtime and extend the operational life of the 1746-NT4, reducing total cost of ownership.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1746-NT4 is fully compatible with the SLC 500 family of programmable logic controllers, including both fixed and modular styles. It communicates with the processor via the backplane, requiring no external power supply. In remote I\/O configurations, the module uses block transfers to exchange data with the processor, ensuring reliable data acquisition.\u003c\/p\u003e\u003cp\u003eThis module integrates seamlessly with Rockwell Automation's programming software, allowing straightforward configuration of channel types, filters, and open-circuit responses. Its compatibility with a wide range of thermocouple types makes it a versatile choice for legacy SLC 500 systems.\u003c\/p\u003e\u003ch2\u003eBuying Guide\u003c\/h2\u003e\u003cp\u003eWhen purchasing the Allen-Bradley 1746-NT4, verify the following to ensure it meets your needs:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e Confirm the catalog number is exactly 1746-NT4 to avoid compatibility issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Choose between new, refurbished, or used units based on your budget and reliability requirements. PLC Source PRO offers quality-assured options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Check the warranty provided by the seller. PLC Source PRO stands behind its products with a comprehensive warranty policy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e Ensure you receive the installation and configuration manual, or download it from Rockwell Automation's website.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor dependable sourcing, consider PLC Source PRO, a trusted supplier of industrial automation spares. With a vast inventory and expert support, they can help you find the right module for your application.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44434707677283,"sku":"1746-NT4","price":269.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1746-A13_3__E5_89_AF_E6_9C_AC_8a776970-973f-4fda-ac75-324fd3198f47.jpg?v=1785769594","url":"https:\/\/www.plcsourcepro.com\/he\/products\/1746-nt4-industrial-automation-module-stable-by-allen-bradley","provider":"PLC Source PRO","version":"1.0","type":"link"}