SLC 500 | Allen-Bradley | 1746-NR8 SER A RTD Resistance Input Module 1746NR8

Product Description: Allen-Bradley 1746-NR8

The Allen-Bradley 1746-NR8 is an 8-channel analog input module designed for use with resistance temperature detectors (RTDs) in SLC 500 systems. This module provides accurate temperature measurement using RTDs and supports a variety of RTD types, including Pt100 and Pt1000. Each channel is individually configurable and offers high-resolution readings for precise control in industrial environments.

Key Features

• 8 individually configurable RTD input channels
• Supports 2-wire and 3-wire RTD configurations
• Compatible with Pt100, Pt1000, Ni100, and other standard RTDs
• High-resolution analog-to-digital conversion
• Built-in diagnostics and status indicators
• Cold junction compensation not required (RTD-based module)
• Integration with RSLogix 500 for configuration and monitoring
• No external power supply needed for sensor excitation

Technical Specifications

• Number of Channels: 8
• Supported RTD Types: Pt100, Pt1000, Ni100, Ni120, Cu10
• Measurement Range: -200°C to +850°C (depending on sensor type)
• Resolution: 14 bits
• Input Impedance: >1 MΩ
• Sensor Excitation: Internal, fixed current source
• Conversion Time: Approx. 440 ms for all 8 channels
• Wire Types: 2-wire and 3-wire RTDs
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Mounting: 1746 chassis slot
• Certifications: UL, CE, CSA

Application Areas

• Industrial process temperature monitoring
• Heating, cooling, and thermal control systems
• Food and beverage manufacturing
• HVAC and climate control systems
• Batch process applications
• Equipment requiring accurate RTD-based temperature inputs

Advantages

• High channel density reduces module count and panel space
• Accurate and reliable temperature input from RTD sensors
• Simple integration into existing SLC 500 systems
• Supports flexible wiring methods for RTDs
• Ideal for stable temperature measurement in industrial environments