Allen-Bradley 1745-E153 Expansion Unit is an I/O expansion module for Allen-Bradley SLC 100 and SLC 150 programmable logic controllers, designed to extend the controller’s I/O capacity. It supports 10–30 VDC inputs configured as sinking inputs, adding additional input points to the SLC-150 series. This expansion unit is used to grow discrete I/O in simple automation tasks, such as machine controls and packaging lines, where extra digital inputs are required.
