Allen-Bradley 1771-IR Resistance Temperature Detector (RTD) input module.

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1、Overview 

The Allen-Bradley 1771-IR is a resistance temperature detector (RTD) input module designed for PLC-5 and 1771 series I/O systems. The module is used to accurately monitor temperature signals in industrial automation and process control applications. It supports multiple RTD sensor types and provides reliable temperature acquisition with high accuracy and strong noise immunity. The 1771-IR is widely used in manufacturing, power generation, chemical processing, and other industrial environments that require stable and precise temperature monitoring.

2、Details 

3、Main Features 

Ø 6-channel RTD input module designed for Allen-Bradley PLC-5 and 1771 I/O systems.

Ø Supports both platinum and copper RTD sensors for flexible temperature measurement applications.

Ø High-resolution analog conversion provides accurate and stable temperature monitoring.

Ø Measures temperature in both Celsius and Fahrenheit units.

Ø Compatible with 3-wire RTD inputs to improve measurement accuracy and reduce lead resistance errors.

Ø Fast channel update time enhances real-time process monitoring performance.

Ø Built-in diagnostic and status indicators simplify troubleshooting and maintenance.

Ø Strong noise immunity and industrial-grade isolation ensure reliable operation in harsh environments.

Ø Rack-mounted modular design allows easy installation and system expansion.

Ø Supports temperature measurement ranges from -200°C to +870°C depending on sensor type.

4、FQA 

Q: What is the Allen-Bradley 1771-IR used for?

A: The 1771-IR is an RTD input module used for industrial temperature monitoring and process control applications.

Q: How many input channels does the 1771-IR support?

A: The module provides 6 RTD input channels for temperature sensing applications.

Q: Which RTD sensor types are compatible with the 1771-IR?

A: It supports 100-ohm platinum RTDs and 10-ohm copper RTD sensors.

Q: What are the main advantages of the 1771-IR?

A: Key advantages include high measurement accuracy, stable temperature monitoring, strong anti-interference capability, and reliable PLC-5 system integration.

Q: Is the 1771-IR still available from Rockwell Automation?

A: No, the 1771-IR has been discontinued by Rockwell Automation, but repair and replacement services are still available in the industrial market.

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