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- Allen Bradley
- 1746-NR4
- PLC Module/Rack
- USA
- 145 × 35 × 140 mm
- 0.45kg
- Xiamen, China
- New & In Stock
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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.
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Allen-Bradley 1746-NR4 Detailed Technical Overview
1. Product Overview
The Allen-Bradley 1746-NR4 is an RTD (Resistance Temperature Detector) and resistance input module used in the SLC 500 PLC system. It is designed to acquire temperature and resistance signals from field devices and convert them into digital data for PLC processing.
This module provides four independent input channels, each capable of accepting signals from RTD sensors or direct resistance sources. It is commonly used in industrial environments where accurate temperature monitoring and resistance measurement are required.
The module plays a key role in process control systems by ensuring stable and accurate measurement of thermal and resistance-based variables.
2. Brand Information
- Brand: Allen-Bradley
- Industry: Industrial automation and control systems
- Product Type: RTD / resistance analog input module
This brand is widely used in industrial automation due to its reliability, long service life, and strong compatibility with PLC systems.
3. Product Series
- Series: SLC 500
- Category: Analog input module
- Module Type: RTD / resistance input
The SLC 500 system is a modular PLC platform. The 1746-NR4 is designed specifically for temperature and resistance measurement applications within this system.
4. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Model | 1746-NR4 |
| Module Type | RTD / Resistance Input |
| Series | SLC 500 |
| Number of Channels | 4 |
| Input Signal Type | RTD / Resistance |
| Supported RTD Types | Platinum, Nickel, Copper, Nickel-Iron |
| Resistance Range | 0–150 Ω / 0–500 Ω / 0–1000 Ω / 0–3000 Ω |
| Temperature Range | -200°C to 850°C |
| Resolution | 0.01°C |
| Conversion Method | Sigma-Delta |
| Update Time | 17 ms – 1.2 s (configurable) |
| Filtering | Programmable digital filtering |
| Backplane Current (5V) | 50 mA |
| Backplane Current (24V) | 50 mA |
| Power Consumption | 1.5 W max |
| Isolation | 500 V AC / DC |
| Max Common Mode Voltage | ±1 V |
| Max Overload | ±5 V / ±5 mA |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Dimensions (mm) | 145 × 35 × 140 |
| Weight (kg) | 0.26–0.45 kg (varies by revision) |
5. Product Functions and Applications
Functional Description
- Reads resistance signals from RTD sensors
- Converts resistance values into temperature data
- Supports multiple RTD sensor types
- Provides broken sensor detection and diagnostics
- Enables stable signal filtering for industrial environments
Typical Applications
- Industrial temperature monitoring systems
- Chemical and petrochemical processing
- HVAC and environmental control systems
- Plastic molding and thermal processing equipment
- Food and pharmaceutical production lines
- Resistance-based measurement systems
6. Product Advantages
1. High Measurement Accuracy
Provides precise temperature and resistance readings with fine resolution down to 0.01°C.
2. Wide Sensor Compatibility
Supports multiple RTD types including platinum, nickel, and copper sensors.
3. Strong Diagnostic Functions
Includes open-circuit and short-circuit detection for reliable operation.
4. Industrial Noise Resistance
High isolation level ensures stable operation in noisy environments.
5. Flexible Configuration
Each channel can be independently configured for different measurement ranges.
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-NO4I | Analog Output | 4 | Current | 145 × 35 × 140 | 0.32 |
| 1746-NO4V | Analog Output | 4 | Voltage | 145 × 35 × 140 | 0.33 |
8. Recommended Popular Models (Same Brand)
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