Allen-Bradley 1747-L532 SLC 500 Programmable Logic Controller

Allen-Bradley 1747-L532 is a SLC 500 modular CPU (SLC 5/03) designed for mid‑range control tasks, delivering 16K words of user memory for ladder logic and data storage. It provides DH-485 and RS‑232 serial communications, enabling DH-485 networking with Data Highway Plus I/O and a dedicated RS‑232 port for programming and diagnostics. The processor is fast enough for typical SLC 500 applications, with a documented program scan time around 1 millisecond and an I/O scan time near 0.225 milliseconds, depending on I/O configuration. As part of the SLC 500 family, it integrates with standard SLC backplanes and a wide range of digital I/O modules, suitable for machine control, conveyors, and automation tasks that rely on legacy serial networks. This 5/03 processor is commonly used in retrofit and expansion projects where existing DH‑485 networks and RS‑232 programming interfaces are in place, and it remains compatible with widely used RSLogix 500 software environments for configuration and troubleshooting.