Allen-Bradley 1756-M23 ControlLogix Modular I/O Module

Allen-Bradley 1756-M23 ControlLogix Modular I/O Module is a Rockwell Automation I/O card designed for the ControlLogix platform. It installs in a 1756 ControlLogix chassis and communicates with the Logix controller over the backplane to provide scalable input and/or output capability for industrial automation tasks. As part of the 1756 I/O family, the 1756-M23 integrates with Studio 5000/Logix Designer for configuration, monitoring, and diagnostics, enabling centralized management of I/O across a production line. Typical applications include manufacturing automation, packaging lines, material handling, and process-control environments where consolidated, modular I/O expansion is advantageous. The exact channel count, I/O type (digital/analog-focused variants), voltage ranges, and electrical characteristics depend on the variant and firmware, so precise specifications should be verified against the official Rockwell Automation datasheet for your specific revision. In a ControlLogix system, modules like the 1756-M23 share the chassis’s power and communication resources and map I/O data to the processor’s data table, enabling deterministic, low-latency control across a centralized automation network. This makes it suitable for applications requiring tight integration of I/O with a single, scalable control architecture, while benefiting from the broader ecosystem of 1756-series modules and Rockwell’s design and diagnostic tooling. For exact compatibility with your chassis, firmware level, and I/O requirements, consult the official product datasheet and configuration guides from Rockwell Automation.