Description
Description
The Allen-Bradley 1746-NR8 is an 8-point RTD/Resistance input module designed for use within the SLC 500 programmable controller system. This module provides high-precision temperature and resistance monitoring, allowing for the direct connection of RTD sensors or resistance-based devices to the PLC backplane. It is engineered to deliver reliable signal conditioning and conversion for industrial process control applications.
Features
- 8-point input density for multi-channel temperature monitoring.
- Compatible with standard SLC 500 I/O chassis configurations.
- Supports a variety of RTD types and resistance ranges.
- Low power consumption profile for efficient rack operation.
- Integrated signal filtering for improved noise immunity in industrial environments.
Applications
This module is typically utilized in process automation environments requiring precise temperature measurement, such as HVAC systems, chemical processing, food and beverage manufacturing, and thermal management systems within industrial machinery.
Technical Specifications
| Product Model |
1746-NR8 |
| Module Type |
RTD/Resistance Input Module |
| Input Points |
8 |
| Backplane Current |
100 mA @ 5V DC; 55 mA @ 24V DC |
| Power Consumption |
1.82W maximum (0.5W @ 5V DC, 1.32W @ 24V DC) |
| Step Response |
60 ms (in), 2.5 ms (out) |
| Operating Temperature |
0 to 60 degC (32 to 140 degF) |
| Chassis Placement |
Any slot except Slot 0 |
Installation Guidelines
- Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
- The module can be installed in any available slot of the I/O chassis, with the exception of Slot 0.
- Use appropriate shielded cabling for RTD inputs to minimize electromagnetic interference (EMI).
- Ensure proper grounding of the chassis to maintain signal integrity and safety.
- Handle the module using ESD-safe practices to prevent damage to internal circuitry.
- Verify that the backplane power supply capacity is sufficient for the total load of all installed modules.
FAQ
What types of sensors can be connected to the 1746-NR8?
The 1746-NR8 is designed to interface with RTD (Resistance Temperature Detector) sensors and resistive inputs. Refer to the specific Allen-Bradley user manual for the 1746-NR8 for the list of supported RTD types (e.g., Pt100, Ni100) and resistance ranges.
Can this module be placed in any slot?
No, the 1746-NR8 can be placed in any slot of the SLC 500 I/O chassis except for Slot 0, which is reserved for the processor.
