The Allen-Bradley 1756-L63 is part of the 5560 ControlLogix series of Programmable Automation Controllers (PACs). It is equipped with 8 MB of user memory and 478 KB of I/O memory, providing robust memory capacity for complex automation tasks.
The Allen-Bradley/Rockwell Automation 1756-L63S is a GuardLogix controller within the Allen-Bradley ControlLogix product family. It offers all the same features as the standard ControlLogix controllers, with the added functionality for safety applications