Siemens 6ES5376-1AA11 SIMATIC PLC Controller Module

Siemens 6ES5376-1AA11 is a memory submodule for the SIMATIC S5 programmable logic controller family, an EPROM-based module that supplies 16 KB of memory to store the controller’s program data, enabling reliable retention across power cycles. The module is described as CMOS-EPROM and is intended to slot into the S5 memory architecture as a dedicated memory submodule (376), preserving firmware and user code within the control system. In legacy industrial installations, it is used in conjunction with S5 CPUs and expansion interfaces to expand or replace memory capacity, providing a compact, plug-in solution for preserving critical control logic and data in environments where Siemens S5 equipment remains active.