The Allen-Bradley 1747-L30D is a fixed I/O SLC 500 PLC processor module that provides 30 I/O channels—18 inputs and 12 outputs—for mid-range control tasks in a backplane-based chassis. It includes a DH-485/RS-232 communications port for programming and device networking and operates from 120/240 VAC power, with support for a 2-slot expansion chassis to scale I/O as needed. This processor belongs to the SLC 500 family and is designed for standalone or distributed control configurations within legacy Allen-Bradley systems.
