The 1794-IR8 is a thermistor input module from Rockwell Automation's Allen-Bradley 1794 Flex I/O series. This module is specifically designed to accept inputs from thermistors, which are temperature-sensitive resistors used for measuring and monitoring temperature.

Here are some key features of the 1794-IR8 thermistor input module:

- It supports up to 8 thermistor input channels.

- The module is compatible with a variety of thermistor types, including negative temperature coefficient (NTC) and positive temperature coefficient (PTC) thermistors.

- It provides accurate temperature measurement and monitoring capabilities with configurable temperature scaling options.

- The 1794-IR8 module offers built-in diagnostics and fault detection features for enhanced system reliability.

- It can be easily integrated and configured within the Flex I/O system using Rockwell Automation's software tools, such as RSLogix 5000 or Studio 5000.

The 1794-IR8 thermistor input module is commonly used in industrial automation applications where temperature monitoring and control are essential. It allows the PLC system to accurately measure and respond to changes in temperature, enabling efficient operation and control of various processes.