1794-IRT8 Wiring Diagram: A Comprehensive Guide

If you are looking for a reliable and efficient way to wire your 1794-IRT8 module, then you have come to the right place. In this article, we will provide you with a comprehensive guide on how to wire your 1794-IRT8 module, including the necessary tools, the step-by-step process, and some frequently asked questions.

What is the 1794-IRT8 Module?

The 1794-IRT8 module is a temperature input module that provides eight thermocouple or RTD input channels for precise temperature measurements. The module is compatible with a wide range of PLC systems, including the ControlLogix, FlexLogix, and CompactLogix platforms.

The 1794-IRT8 module is designed for industrial applications that require accurate and reliable temperature measurements, such as in the chemical, oil and gas, and food and beverage industries.

Tools Required

Before you begin wiring your 1794-IRT8 module, there are some tools that you will need. These include:

Tool Description
Wire cutters/strippers To cut and strip wires
Screwdriver To tighten screws and terminals
Thermocouples or RTDs To measure temperature
Wiring diagram To guide you through the wiring process

Step-by-Step Wiring Process

Step 1: Safety Precautions

Before you start wiring, make sure that the power is disconnected from the system. This will prevent any accidents while you are working with the wires.

Step 2: Identify the Inputs and Outputs

Identify the inputs and outputs of your 1794-IRT8 module. The inputs are the thermocouples or RTDs that you will be using to measure temperature, and the outputs are the terminals that will connect to your PLC system.

Step 3: Connect the Inputs

Connect the thermocouples or RTDs to the input terminals of your 1794-IRT8 module. Make sure that the wires are securely connected and tightened using a screwdriver.

Step 4: Connect the Outputs

Connect the output terminals of your 1794-IRT8 module to your PLC system. Follow the wiring diagram provided by your PLC manufacturer to ensure that the connections are correct.

Step 5: Power Up

Once you have completed the wiring, power up your system and test your 1794-IRT8 module. Use a multimeter to check the readings from your thermocouples or RTDs and ensure that they are accurate.

Frequently Asked Questions

What is the maximum operating temperature of the 1794-IRT8 module?

The 1794-IRT8 module can operate at temperatures up to 75°C (167°F) for thermocouples and 85°C (185°F) for RTDs.

What is the maximum wire size that can be used with the 1794-IRT8 module?

The maximum wire size that can be used with the 1794-IRT8 module is 14 AWG (2.08 mm²).

What is the maximum distance between the thermocouple or RTD and the 1794-IRT8 module?

The maximum distance between the thermocouple or RTD and the 1794-IRT8 module is 50 feet (15 meters).

What is the accuracy of the 1794-IRT8 module?

The accuracy of the 1794-IRT8 module is ±0.1% full scale for thermocouples and ±0.1°C (±0.18°F) for RTDs.

How do I troubleshoot my 1794-IRT8 module if it is not working?

If your 1794-IRT8 module is not working, first check the wiring connections to make sure they are securely connected and tightened. Also, ensure that the power is connected and that your PLC system is properly configured. If the problem persists, consult the user manual or contact the manufacturer for assistance.


Wiring your 1794-IRT8 module is a straightforward process that can be accomplished with some basic tools and a wiring diagram. Follow the step-by-step process outlined in this article and refer to the frequently asked questions for troubleshooting tips. With proper wiring and setup, your 1794-IRT8 module will provide reliable and accurate temperature measurements for your industrial applications.