1746-NR4 SLC 500 RTD Analog Input Module 4 Channels

Product Overview

The 1746-NR4 is a high-performance RTD analog input module. It belongs to the Rockwell Automation SLC 500 series. This module provides four input channels. It measures resistance and temperature with high accuracy. The module uses sigma-delta modulation for conversion. It delivers a resolution of 0.01 degrees Celsius. This makes it ideal for precise industrial monitoring. The module fits into any I/O chassis slot except slot 0. It offers a bandwidth range from 2.62 to 65.5 Hertz. The update time varies from 17 milliseconds to 1.2 seconds. This flexibility suits many control applications.

Application Scenarios

This module works well in temperature monitoring systems. It is common in process control environments. Industries like chemical and food processing use it. It can monitor motor winding temperatures. It also tracks bearing temperatures in machinery. The module supports many RTD sensor types. These include platinum, copper, nickel, and nickel-iron sensors. It handles resistance ranges from 0 to 1500 Ohms. This makes it versatile for different measurement tasks. Engineers use it for quality control and safety systems. It helps maintain optimal operating conditions.

Technical Specifications

1746-NR4 has four analog input channels. It works with platinum (385) 100 to 1000 Ohm sensors. It also supports platinum (3816) 100 to 1000 Ohm. Copper (426) 10 Ohm and nickel (618) 120 Ohm sensors work too. Nickel (672) 120 Ohm and nickel-iron (518) 604 Ohm are compatible. The resistance input ranges from 0 to 1500 Ohms. The backplane current draw is 50 mA. Power consumption is 1.5 W maximum. This includes 0.3 W at 5V DC and 1.2 W at 24V DC. The step response is 60 milliseconds in and 2.5 milliseconds out. Operating isolation is 500 Volts for 1 minute. Operating temperature ranges from 0 to 60 degrees Celsius. Storage temperature is -40 to 85 degrees Celsius.

Installation & Maintenance Guide

Install the module in any slot except slot 0. Ensure the chassis power is off before insertion. Align the module with the backplane connector. Push firmly until it locks into place. Secure the module with the retaining screws. Connect wiring according to the user manual. Use twisted-pair cables for best noise immunity. Keep sensor wires away from power cables. Clean the module with a dry cloth only. Check for loose connections regularly. Replace the module if it shows signs of damage. Always follow standard safety procedures.

Packing List

Each package includes one 1746-NR4 module. It also contains a quick reference guide. A warranty card is included with the shipment. No additional accessories are provided. The module is packed in an anti-static bag. It ships in a sturdy cardboard box. We use FedEx, UPS, or DHL for delivery. All shipments are fully insured.