Description
Allen-Bradley 1746-NT4 Thermocouple/mV Input Module
The Allen-Bradley 1746-NT4 delivers precise temperature measurement for SLC 500 systems. This 4-channel module supports multiple thermocouple types and millivolt signals. It ensures accurate data acquisition for industrial process monitoring and control applications.
Key Technical Specifications
- Brand & Manufacturer: Allen-Bradley / Rockwell Automation
- Model: 1746-NT4 (SLC 500 Series)
- Module Type: Thermocouple/mV Analog Input
- Number of Channels: 4 isolated input channels
- Thermocouple Types: J, K, T, E, R, S, B, N
- mV Input Ranges: ±50mV, ±100mV
- Resolution: 16-bit (65,535 counts)
- Update Time: 26ms to 1.2s (programmable)
- Cold Junction Compensation: Built-in CJC sensors
- Open Circuit Detection: Zero, Upscale, Downscale options
- Filter Frequencies: 10Hz, 50Hz, 60Hz, 250Hz selectable
- Backplane Current: 60mA @ 5V DC, 40mA @ 24V DC
- Power Consumption: 0.8W maximum
- Isolation: Channel-to-backplane isolation
- Operating Temperature: 0° to 60°C (32° to 140°F)
- Storage Temperature: -40° to 85°C (-40° to 185°F)
- Wire Size: 14 AWG (2.5mm) maximum
- Cable Impedance: 25Ω maximum
Installation Guide
- Install in any SLC 500 slot except slot 0
- Use shielded twisted thermocouple extension wires
- For mV signals: Use Belden 8761 or equivalent cable
- Maximum wire size: 14 AWG (2.5mm)
- Two wires per terminal maximum
- Follow all local electrical codes and standards
Package Contents
- One (1) 1746-NT4 thermocouple/mV module
- Installation documentation
- All necessary mounting hardware
- Five status LED indicators (module + 4 channels)
Warranty Coverage
- 12-month warranty included
- Comprehensive defect coverage
- Quick technical support response
- Straightforward warranty process
Frequently Asked Questions
- Q: What thermocouple types does this module support?
A: The 1746-NT4 supports types J, K, T, E, R, S, B, and N thermocouples. - Q: How does cold junction compensation work?
A: Built-in CJC sensors measure terminal block temperature to ensure accurate thermocouple readings. - Q: What happens if a thermocouple wire breaks?
A: The module detects open circuits and can be configured to show zero, minimum, or maximum values. - Q: Can I mix thermocouple and mV signals on one module?
A: Yes, each channel independently configures for either thermocouple or mV input signals. - Q: What filter settings are available for noise reduction?
A: Selectable filter frequencies include 10Hz, 50Hz, 60Hz, and 250Hz for different noise conditions.
Download User Manual
- Complete installation instructions
- Detailed wiring diagrams
- Configuration guidelines
- Download here: SLC 500 Hardware Manual
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