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The Allen-Bradley 1746-NR4 is a 4-point resistance input module designed for the SLC 500 programmable logic controller system. This analog input module is specifically engineered to interface with RTD (Resistance Temperature Detector) sensors and resistive devices, providing high-precision temperature or resistance monitoring in industrial automation environments. It allows for the integration of various resistance-based sensors directly into the SLC 500 rack, facilitating reliable data acquisition for process control applications.
This module is widely utilized in industrial process control systems requiring temperature monitoring, such as HVAC systems, chemical processing, food and beverage manufacturing, and machinery thermal management. It is suitable for applications where precise resistance-to-digital conversion is required for PLC logic processing.
| Product Model | 1746-NR4 |
| Module Type | 4-Point Resistance/RTD Input |
| Backplane Current | 50 mA @ 5V DC; 50 mA @ 24V DC |
| Power Consumption | 1.5 W max (0.3 W @ 5V, 1.2 W @ 24V) |
| Bandwidth | 2.62 - 65.5 Hz |
| Chassis Location | Any slot except Slot 0 |
No, the Allen-Bradley 1746-NR4 was discontinued by the manufacturer on December 30, 2015. We provide refurbished or surplus units to support legacy systems.
No, the 1746-NR4 must be installed in any I/O slot other than Slot 0, which is reserved for the SLC 500 processor.