The Allen Bradley 1746-NT4 is a 4-channel thermocouple/millivolt (mV) analog input module from the SLC 500 series. Designed for precise temperature and low-voltage measurements, it supports various thermocouple types and mV input ranges, making it ideal for diverse industrial automation applications.
Technical Specifications
- Model: 1746-NT4
- Series: SLC 500
- Type: 4-Channel Thermocouple/mV Analog Input Module
- Mounting: Rack-mounted (1 slot width)
- Input Channels: 4 backplane-isolated channels
- Supported Thermocouple Types: J, K, T, E, S, R, B, N
- mV Input Ranges: ±50 mV, ±100 mV
- Resolution: 16-bit
- Update Time: 26 ms to 1.2 seconds
- Step Response: 12 to 300 ms (95% full scale)
- Backplane Current: 60 mA @ 5V DC; 40 mA @ 24V DC
- Backplane Power Consumption: 0.8W maximum (0.3W @ 5V DC, 0.5W @ 24V DC)
- Input Filter Frequencies: 10 Hz, 50 Hz, 60 Hz, 250 Hz
- Cold Junction Compensation (CJC): Integrated sensors on terminal block
- Isolation Voltage: 500V DC continuous (input to backplane and chassis ground)
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C (-40°F to 185°F)
- Relative Humidity: 5% to 95% non-condensing
- Certifications: UL, CSA, CE
- Lifecycle Status: Discontinued
- Manufacturer: Allen Bradley (Rockwell Automation)
Key Features
- Supports multiple thermocouple types and mV input ranges
- High-resolution 16-bit analog-to-digital conversion
- Integrated cold junction compensation for accurate temperature readings
- Selectable input filter frequencies to minimize electrical noise
- LED indicators for channel and module status monitoring
- Compatible with SLC 500 chassis and processors
Compatible Components & Accessories
- Allen Bradley SLC 500 chassis and processors
- Allen Bradley I/O and communication modules
- RSLogix 500 programming software
- PanelView HMIs and expansion I/O
Industry Applications
- Process control systems
- Temperature monitoring in manufacturing
- Water treatment and utilities
- Food and beverage processing
- Pharmaceutical manufacturing
Installation & Maintenance Notes
- Install in a clean, dry panel or cabinet
- Ensure proper alignment in the chassis slot (avoid slot 0)
- Use appropriate thermocouple extension wires or shielded cables for mV inputs
- Configure input filter frequencies based on application requirements
- Periodically inspect for dust or electrical wear
- Use RSLogix 500 for diagnostics and setup
- Power down before removing or inserting module
Request a Quote
For pricing and availability, please Contact Us or call 1-800-755-2883.
Disclaimer: TCI Supply is not an authorized distributor of Allen Bradley products.
Frequently Asked Questions
What types of thermocouples are supported by the 1746-NT4 module?
The 1746-NT4 supports thermocouple types J, K, T, E, S, R, B, and N, providing flexibility for various temperature measurement applications.
Does the 1746-NT4 module support millivolt input signals?
Yes, the module accepts direct millivolt inputs of ±50 mV and ±100 mV, allowing for integration with various low-voltage sensors.
How does the module handle cold junction compensation (CJC)?
The 1746-NT4 includes integrated CJC sensors on its removable terminal block, ensuring accurate temperature readings by compensating for the junction temperature.