Allen-Bradley 1747-L552 SLC 500 Processor Unit

The Allen-Bradley 1747-L552 SLC 500 processor unit provides centralized control, logic processing, and Ethernet (EtherNet/IP) and RS-232 communication for industrial automation systems. As part of the SLC 500 family (SLC 5/05), it offers 32K words of user memory, supports up to 4096 inputs and 4096 outputs, up to 480 analog I/O points, and Ethernet with BOOTP enabled for up to ~48 connections. The module mounts in a chassis rack, supports up to 3 I/O chassis (30 total slots), is ladder-logic programmable, and includes battery backup; dimensions are roughly 145 × 35 × 142 mm. Common applications include manufacturing systems, packaging lines, and material handling where reliable PLC control and plant-wide integration are needed. Common replacements include 1747-L553 and 1747-L551.