The Allen-Bradley 1747-L542 SLC 5/04 Processor is a CPU module for the SLC 500 modular PLC system. It provides 32K memory (28K program, 4K data) and includes RS-232 and DH+ communications for programming and field-networking. With firmware revision FRN 7, it is designed for 1747 backplanes and is commonly used in small- to mid-sized discrete manufacturing or batch-control applications requiring DH+ connectivity.
