Siemens 6ES5375-1LA41 Programmable Logic Controller Module

Siemens 6ES5375-1LA41 is a SIMATIC S5 memory submodule (EPROM) designed for the 375 memory subsystem of the classic SIMATIC S5 PLC family. This CMOS EPROM module provides 32 Kbytes of non-volatile storage for PLC programs and parameters, enabling secure retention across power cycles and aiding program archival in aging systems. The 6ES5375-1LA41 is used as a spare part or replacement within S5 racks, matching the 375 memory submodule interface to CPU modules and associated IM interfaces in legacy installations. Typical applications include industrial automation environments that still rely on Siemens S5 controllers, where they serve to store the firmware image and user data for the 375 memory submodule configuration. The part is referenced in datasheets as 'EPROM MODULE 375 CMOS EPROM, 32 KByte' and is listed among Siemens-compatible memory submodules for SIMATIC S5 systems.