Description:

The Allen-Bradley 1746-NR8 SLC 500 RTD Resistance Input Module is used in SLC 500 series PLC systems to provide precise resistance signal acquisition from RTD temperature sensors for accurate process monitoring and control. Commonly installed in industrial control panels, SLC racks, and distributed automation systems where dependable temperature measurement from RTDs is critical for process regulation, safety monitoring, and feedback loops. Maintenance teams and system integrators use this module for control system expansions, retrofit upgrades, replacement of failed input modules, and enhancement of temperature sensing performance.

Applications:

The Allen-Bradley 1746-NR8 RTD resistance input module is commonly used in industrial automation environments such as water and wastewater treatment plants, HVAC and building automation systems, chemical processing equipment, material handling machinery, food and beverage processing lines, and thermal process control applications where accurate and reliable temperature measurement ensures efficient control and safety compliance.

Technical Specifications:

• Manufacturer: Allen-Bradley
• Model: 1746-NR8
• Product Type: RTD Resistance Input Module
• Series: SLC 500 I/O Module
• Input Channels: Multiple RTD resistance input channels
• Sensor Support: 2-wire/3-wire/4-wire RTDs (model dependent)
• Signal Type: RTD resistance measurement for temperature sensing
• Compatibility: Allen-Bradley SLC 500 PLC systems
• Interface: Backplane connection to SLC chassis
• Mounting Type: Rack mounted module
• Function: Converts RTD resistance into process values for PLC logic
• Application Category: Industrial temperature sensing and process control
• Operating Temperature Range: Industrial-rated conditions
• Protection Rating: Installed within control enclosure

Common Replacements:

• Allen-Bradley 1746-NI8 Analog Input Module
• Allen-Bradley 1769-IR4 MicroLogix RTD Input Module
• Allen-Bradley 1734-IT8 POINT I/O Thermocouple/RTD Input Module