Allen-Bradley 1747-L514 SLC 500 Processor Unit

The Allen-Bradley 1747-L514 SLC 500 Processor Unit is a compact CPU for the SLC 500 modular automation platform. The 1747-L514 corresponds to a SLC 5/01 processor and includes 4K of memory, designed to reside in a 1747 backplane chassis. In the SLC 500 family, this CPU handles ladder logic execution and coordinates communication with I/O modules via the chassis backplane, serving as the control heart of small to mid-size machines. It occupies the left-hand slot (slot 0) in a typical chassis configuration and integrates with 1747-series I/O modules and the standard 1747 backplane to form a complete control system. The 4K memory supports the program and data needs of typical control tasks, providing a balance between capability and cost for legacy automation installations. The 1747-L514 is a suitable option for maintaining and upgrading existing SLC 500 lines, allowing replacement or upgrade within an established 1747-based rack without requiring a migration to newer control architectures.