Allen-Bradley 1794-IRT8 Flex I/O RTD Thermocouple Input Module By wayne No Comments on Allen-Bradley 1794-IRT8 Flex I/O RTD Thermocouple Input Module 3 Min Read The Allen-Bradley 1794-IRT8 is an 8-channel Flex I/O module for RTD and thermocouple inputs. It offers 14-bit resolution and selectable data formats for precise temperature measurement.