Allen-Bradley 1756-IA16 Digital Input Module

Allen-Bradley 1756-IA16 is a 16-point digital input module for Rockwell Automation's ControlLogix platform that accepts digital AC input signals in the 79–132 V AC range (nominally 120 V AC) to register on/off states from field devices. It plugs into a 1756 I/O backplane in a ControlLogix chassis, providing 16 discrete input points that enable the controller to monitor sources such as pushbuttons, limit switches, and sensors wired to line-voltage circuits. As a digital AC input module, the IA16 is designed to interface directly with 120 V AC field wiring, aligning with Rockwell's ControlLogix I/O architecture for scalable, integrated automation. The module adheres to the ControlLogix IO specifications and supports operation within 0–60 °C (32–140 °F), with environmental ratings defined for Rockwell's 1756 IO family, facilitating reliable performance in typical industrial environments. In practice, this module integrates with Studio 5000/Logix Designer projects to provide reliable digital input data across a 16-channel matrix, enabling straightforward wiring and centralized diagnostics for multi-device automation systems.