ProductPRODUCT
Featured products
Contact Us
- Allen Bradley
- 1746-NT8
- PLC Module/Rack
- USA
- 251 × 171 × 58 mm
- 0.45kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
- 66
Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |
Allen-Bradley 1746-NT8 Detailed Technical Overview
1. Product Overview
The Allen-Bradley 1746-NT8 is an 8-channel thermocouple and millivolt (mV) input module designed for the SLC 500 PLC system. It is used to measure temperature signals from thermocouple sensors and low-level millivolt signals, converting them into digital data for PLC processing.
Each channel is independently configurable, allowing multiple thermocouple types to be used simultaneously. This makes it suitable for complex temperature monitoring systems where different zones or processes require different sensor types.
The module is widely applied in industrial environments requiring high-accuracy temperature acquisition and stable long-term operation.
2. Brand Information
- Brand: Allen-Bradley
- Industry: Industrial automation and control systems
- Product Type: Thermocouple / mV analog input module
This brand is known for durable PLC hardware, widely used in process industries and manufacturing automation systems.
3. Product Series
- Series: SLC 500
- Category: Analog input module
- Module Type: Thermocouple / millivolt input
The SLC 500 system is a modular PLC platform. The 1746-NT8 is designed specifically for high-channel temperature measurement applications using thermocouple sensors.
4. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Model | 1746-NT8 |
| Module Type | Thermocouple / mV Input |
| Series | SLC 500 |
| Number of Channels | 8 |
| Input Signal Type | Thermocouple / Millivolt |
| Supported Thermocouple Types | J, K, T, E, R, S, B, N |
| mV Input Range | ±50 mV / ±100 mV |
| Temperature Range | -200°C to 1820°C (depending on type) |
| Resolution | 16-bit |
| Conversion Method | Sigma-Delta ADC |
| Update Time | 356 ms – 4.05 s |
| Step Response | 60 ms (input) |
| Input Filtering | Programmable digital low-pass filter |
| Normal Mode Rejection | >100 dB @ 50/60 Hz |
| Common Mode Rejection | >100 dB @ 50/60 Hz |
| Backplane Current (5V) | 120 mA |
| Backplane Current (24V) | 70 mA |
| Power Consumption | 2.28 W max |
| Isolation | 500 V DC (input to backplane & chassis) |
| Channel Isolation | 12.5 V DC continuous |
| Open Circuit Detection | Yes |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Dimensions (mm) | 251 × 171 × 58 |
| Weight (kg) | 0.34 – 0.45 kg |
5. Product Functions and Applications
Functional Description
- Converts thermocouple voltage signals into digital temperature values
- Supports multiple thermocouple types in one module
- Provides millivolt signal measurement capability
- Includes automatic cold junction compensation
- Detects open-circuit and fault conditions
- Applies digital filtering to reduce signal noise
- Supports multi-zone temperature acquisition
Typical Applications
- Industrial furnace temperature monitoring
- Heat treatment and metallurgy processes
- Petrochemical and chemical production systems
- Plastic extrusion and injection molding
- Power plant thermal monitoring systems
- Multi-zone industrial heating systems
6. Product Advantages
1. High Channel Capacity
Eight input channels allow efficient monitoring of multiple temperature points.
2. Wide Sensor Compatibility
Supports a full range of thermocouple types and mV inputs.
3. High Signal Accuracy
16-bit resolution ensures precise temperature measurement.
4. Strong Industrial Noise Resistance
High common-mode rejection improves signal stability in harsh environments.
5. Built-in Diagnostics
Automatic detection of wiring faults improves system reliability and reduces downtime.
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-NT4 | Thermocouple Input | 4 | Thermocouple | 145 × 35 × 140 | 0.32 |
8. Recommended Popular Models (Same Brand)
Popular Automation Modules
| Model | Type | Channels | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1756-L73 | Controller | — | 5V DC | 150 × 140 × 130 | 0.36 |
| 1769-L36ERM | Compact Controller | — | 24V DC | 120 × 90 × 70 | 0.30 |
| 1734-IE8C | Analog Input | 8 | 4–20 mA | 75 × 12 × 60 | 0.16 |
| 1769-OF8C | Analog Output | 8 | 0–10 V | 118 × 87 × 35 | 0.30 |
| 1756-EN2T | Ethernet Module | — | 5V DC | 150 × 140 × 130 | 0.32 |