Allen-Bradley 1747-L532 SLC 500 PLC Processor

The Allen-Bradley 1747-L532 SLC 5/03 Processor is a CPU for the SLC 500 family that provides 16K words of memory for program and data and coordinates PLC logic execution with serial communications on the backplane. It includes a built-in RS-232 port and a DH-485 port for device interoperability, enabling direct programming connections or networked DH-485 communication with other PLCs and devices. Designed for small- to mid-range automation, it supports up to 4,096 I/O points and delivers deterministic execution with a 0.44 μs bit time, while backing memory in flash for non-volatile storage. The module draws up to 500 mA at 5 V and operates in ambient temperatures from 0 to 60 degrees Celsius, fitting typical industrial environments. Compatible with SLC 500 chassis using the 5/03 architecture, the 1747-L532 is commonly paired with RSLogix 500 for programming and monitoring within legacy control systems. In practice, it enables straightforward RS-232 programming and DH-485 networking to connect remote I/O or other controllers, making it a go-to choice for upgrading aging SLC-500 installations where a robust, flash-backed CPU is required.