Allen-Bradley 1756-IRT8I Programmable Logic Controller Module

The Allen-Bradley 1756-IRT8I is an eight-channel, isolated analog input module designed for ControlLogix systems, providing individually isolated inputs to reduce ground-loop and interference issues in demanding environments. Each channel can be configured to accept RTD, resistance (Ohms), thermocouple, or millivolt signals, enabling precise temperature sensing and low-level signal monitoring within a single module. The module delivers 24‑bit resolution per channel and draws about 4.6 W of backplane power, with a typical 24 V backplane current around 200 mA. Its isolated channels and flexible input types make it well-suited for integrating temperature measurement and other precise analog signals into a ControlLogix rack while preserving signal integrity.