Allen-Bradley 1745-E101 Expansion IO Module For SLC-100

The Allen-Bradley 1745-E101 Expansion IO Module for SLC-100 is an expansion unit that adds discrete I/O capacity to the SLC-100 family, enabling the system to support up to 112 I/O circuits when paired with a compatible processor. It is designed for use with either the SLC-100 processor unit or the SLC-150 processor unit and integrates into the 1745 expansion backplane to extend the controller’s I/O count without changing the main CPU. A 1745-C2 communication cable is required to connect the expansion module to the processor, allowing synchronized control of input and output signals across the system. This expansion unit targets discrete digital I/O applications in factory automation, providing additional points to monitor sensors and drive actuators on machines, lines, or processes. It complements other SLC-100 modules in legacy installations, enabling scalable expansion while preserving existing wiring, software, and control logic.