Allen-Bradley 1746-NR4 RTD Module | 4-Channel Input

Allen-Bradley 1746-NR4 Module | Premium RTD Input Solution

Product Overview

The Allen-Bradley 1746-NR4 is a high-performance RTD/resistance input module for SLC 500 systems. It offers four isolated channels for precise temperature and resistance measurements. This module supports multiple sensor types and provides reliable data acquisition. Install it in any slot except slot 0 of your 1746 chassis.

Technical Specifications

• Brand: Allen-Bradley
• Model: 1746-NR4
• Series: SLC 500
• Type: RTD/Resistance Analog Input Module
• Input Channels: 4 (backplane-isolated)
• RTD Types: Platinum 100/200/500/1000Ω, Copper 10Ω, Nickel 120Ω
• Resistance Ranges: 0-150Ω, 0-500Ω, 0-1000Ω, 0-3000Ω
• Temperature Range: -200°C to +850°C
• Resolution: 0.01°C
• Update Time: 17ms to 1.2s (programmable)
• Bandwidth: 2.62-65.5 Hz
• Isolation: 500V DC (inputs to backplane)
• Backplane Current: 50mA @ 5V DC, 50mA @ 24V DC
• Power Consumption: 1.5W maximum
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Conversion Method: Sigma-delta modulation

Expert FAQs

• What RTD types does the 1746-NR4 support?
• It supports Platinum (100/200/500/1000Ω), Copper (10Ω), Nickel (120Ω), and Nickel Iron sensors.
• Can this module detect sensor failures?
• Yes, it features broken sensor detection for open or short circuit conditions.
• What is the minimum temperature it can measure?
• It can measure temperatures as low as -200°C with high precision.
• Does it require external power?
• No, it draws all necessary power from the SLC 500 backplane.
• Can I use it for non-temperature applications?
• Yes, it directly measures resistance for various industrial applications.