Allen-Bradley 1747-L514 SLC 500 Processor Module

The Allen-Bradley 1747-L514 is a SLC 500 modular processor (SLC 5/01) that serves as the central controller for 1747 backplane racks. This CPU provides 4K of memory for program and data, enabling compact control of small- to mid-size automation tasks. As part of the SLC 500 modular family, the 1747-L514 installs in a 1747 backplane and coordinates with compatible I/O modules to execute user programs in legacy PLC systems. Typical uses include discrete manufacturing tasks, simple machine sequencing, and compact process control where a proven, industry-standard PLC is appropriate. Key specifications include 4K user memory and program/I/O performance in the SLC 5/01 class: program scan times around 8 ms (typ) and I/O scan times around 2.6 ms (typ), depending on configuration. This processor embodies Rockwell Automation’s long-standing SLC 500 design lineage, offering compatibility with a broad ecosystem of modules and a familiar development environment for engineers maintaining older automation installations.