The Allen-Bradley 1746-IO4 Digital Input Output Module is a digital I/O module from the 1746 I/O family designed to work with Allen-Bradley controllers. It provides digital input and output signals to interface field devices such as switches, sensors, and actuators with a PLC for simple on/off control in industrial automation. Typical uses include expanding a controller’s I/O in control panels and machine automation where compact digital I/O capability is required.
