1756-L55M14
Allen Bradley ControlLogix Logix5555 Processor (1756-L55) with 3.5Mb Memory Module (1756-M14)

Now obsolete, the 1756-L55M14 is a scalable processor/control module for the ControlLogix PLC system.  The processor module is fitted with 3.5 megabytes of memory which can be upgraded for more memory intensive applications. As well as being able to address a large amount of I/O points, the AB 1756-L55M14 can control local I/O as well as remote I/O across ControlNet, DeviceNet, and Universal Remote I/O networks.  You can even install multiple controllers in a single chassis. Multiple controllers can read input values  from all inputs. A single controller can communicate over multiple communication modules and multiple controllers can share the same communication module.