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- Allen Bradley
- 1746-NT4
- PLC Module/Rack
- USA
- 145 × 35 × 140 mm
- 0.4kg
- Xiamen, China
- New & In Stock
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Allen-Bradley 1746-NT4 Detailed Technical Overview
1. Product Overview
The Allen-Bradley 1746-NT4 is a thermocouple input module designed for use in the SLC 500 PLC system. It is used to acquire temperature signals from thermocouple sensors and convert them into digital values for processing by the PLC controller.
The module provides four independent input channels, each capable of supporting multiple thermocouple types. It is commonly used in industrial environments where accurate and reliable temperature measurement is required under harsh conditions.
By converting low-level thermocouple signals into usable digital data, the module enables precise temperature monitoring and control in process automation systems.
2. Brand Information
- Brand: Allen-Bradley
- Industry: Industrial automation and control systems
- Product Type: Thermocouple input module
The brand is widely used in industrial automation due to its stable performance, long service life, and strong compatibility with PLC systems.
3. Product Series
- Series: SLC 500
- Category: Analog input module
- Module Type: Thermocouple input
The SLC 500 system is a modular PLC platform. The 1746-NT4 is specifically designed for temperature measurement using thermocouple sensors in industrial control applications.
4. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Model | 1746-NT4 |
| Module Type | Thermocouple Input |
| Series | SLC 500 |
| Number of Channels | 4 |
| Input Signal Type | Thermocouple |
| Supported Thermocouple Types | J, K, T, E, R, S, B, N |
| Temperature Range | -270°C to 1820°C (depending on type) |
| Resolution | 0.1°C to 0.5°C |
| Conversion Method | Sigma-Delta ADC |
| Cold Junction Compensation | Built-in automatic |
| Update Time | 250 ms – 1 s (configurable) |
| Backplane Current (5V) | 55 mA |
| Backplane Current (24V) | 50 mA |
| Input Impedance | High impedance (>1 MΩ) |
| Isolation Voltage | 500 V AC |
| Open Circuit Detection | Supported |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5–95% non-condensing |
| Dimensions (mm) | 145 × 35 × 140 |
| Weight (kg) | 0.30 – 0.40 kg |
5. Product Functions and Applications
Functional Description
- Converts thermocouple millivolt signals into digital temperature data
- Supports multiple thermocouple types in a single module
- Provides automatic cold junction compensation
- Detects open circuit and sensor faults
- Filters noise for stable temperature measurement
- Enables multi-zone temperature monitoring
Typical Applications
- Industrial furnace temperature monitoring
- Heat treatment and metallurgy processes
- Chemical and petrochemical plants
- Plastic molding and extrusion systems
- Power generation equipment monitoring
- Food processing temperature control systems
6. Product Advantages
1. Wide Temperature Range Support
Compatible with multiple thermocouple types covering extremely low to very high temperatures.
2. High Measurement Stability
Built-in cold junction compensation ensures accurate readings.
3. Strong Noise Resistance
Designed for industrial environments with electrical interference.
4. Multi-Channel Flexibility
Four independent channels allow multiple temperature zones to be monitored.
5. Fault Detection Capability
Automatic detection of open thermocouple conditions improves system reliability.
7. Recommended Models (Same Series or Related)
SLC 500 Series Related Modules
| Model | Type | Channels | Signal Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1746-NI4 | Analog Input | 4 | Voltage / Current | 145 × 35 × 140 | 0.32 |
| 1746-NI8 | Analog Input | 8 | Voltage / Current | 145 × 35 × 140 | 0.34 |
| 1746-NI16I | Analog Input | 16 | Current | 145 × 35 × 140 | 0.36 |
| 1746-NR4 | RTD Input | 4 | Resistance / RTD | 145 × 35 × 140 | 0.30 |
| 1746-NO4I | Analog Output | 4 | Current | 145 × 35 × 140 | 0.32 |
8. Recommended Popular Models (Same Brand)
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