Allen-Bradley 1747-L552 SLC 500 Series PLC Processor

The Allen-Bradley 1747-L552 is a SLC 5/05 processor in the SLC 500 family, designed for mid‑range industrial automation and compatible with standard SLC 500 modular chassis. It provides 32,000 words of user memory for program and data, supports up to 4,096 inputs and 4,096 outputs, and up to 480 analog I/O points, with a program scan time of about 0.9 ms and an I/O scan time of about 0.225 ms. The CPU includes two communications ports—RS‑232 serial and Ethernet—within the SLC 500 architecture that supports up to 30 module slots across up to 3 I/O chassis, enabling straightforward field wiring and networking for machine control and line automation. This processor is commonly used to control conveyors, packaging lines, and other automated equipment requiring reliable ladder logic control and basic networking capabilities.