Allen-Bradley 1756-L55 ControlLogix Processor

Allen-Bradley 1756-L55 ControlLogix Processor with 1756-M13 Memory Expansion is a high-performance CPU for Rockwell Automation's ControlLogix platform (Logix5555). The 1756-M13 Memory Expansion adds 1.5 MB of memory for user data and program storage to the L55, enabling larger control programs and more extensive tag/data storage in a single chassis; the L55 commonly requires a separate memory module to operate, per Rockwell compatibility guides. This L55/M13 configuration is a Series A ControlLogix solution and supports firmware versions in the 11.x through 16.x range for the 1756-L55 family. Designed for use in backplane-based ControlLogix systems, it coordinates logic and I/O across 1756 modules to drive industrial automation applications.