Product Description
The Allen-Bradley 1746-NR4 is a SLC 500 RTD/Resistance Analog Input Module. It is designed to receive and store digitally converted analog data from RTDs (resistance temperature detectors) or other resistance inputs such as potentiometers. The module can be used with any SLC 500 processor and can be mounted in either a rack-based or chassis-based system.
Product Parameters
- Number of channels: 4
- Input range: 0 to 1000 ohms
- Resolution: 12 bits
- Accuracy: ±0.1% of full scale
- Update rate: 10 ms per channel
- Power requirements: 120 VAC or 240 VAC
Usage Methods
To use the 1746-NR4 module, you will need to connect the RTD or other resistance input to the module’s terminal block. You will also need to connect the module’s power and communication cables to the processor. Once the module is connected, you can configure it using RSLogix 500 software.
Product Advantages
The 1746-NR4 module offers a number of advantages over other analog input modules, including:
- High accuracy and resolution
- Fast update rate
- Easy to configure and use
- Compatible with all SLC 500 processors
Applications
The 1746-NR4 module is used in a wide variety of applications, including:
- Temperature measurement
- Level measurement
- Pressure measurement
- Flow measurement
- Speed measurement
- Position measurement
Example
A 1746-NR4 module could be used to measure the temperature of a liquid in a tank. The RTD would be placed in the tank and the 1746-NR4 module would be used to convert the RTD’s resistance to a temperature value. The temperature value could then be used by the PLC to control the process.
Conclusion
The Allen-Bradley 1746-NR4 is a versatile and reliable analog input module that can be used in a wide variety of applications. It offers high accuracy, resolution, and update rate, making it ideal for measuring temperature, level, pressure, flow, speed, and position.
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