Siemens 6ES5376-1AA31 SIMATIC S5 64KB CMOS-EPROM Memory

Product Description

High-Capacity Non-Volatile Program Storage

The Siemens 6ES5376-1AA31 is a high-density memory submodule belonging to the 376 series of the legacy SIMATIC S5 automation platform. Featuring 64 KB of CMOS-EPROM storage, this module is engineered to provide permanent, non-volatile retention of user programs and complex automation logic. By utilizing CMOS technology, the module offers ultra-low power consumption while protecting critical machine data against power loss or CPU battery failure. This ensures that industrial processes can be resumed instantly without the need for program reloading, making it a cornerstone for the reliability of older Siemens control architectures.

Industrial Durability and Data Integrity

The 6ES5376-1AA31 is built to the rigorous standards of German engineering, designed to operate within the high-EMI (electromagnetic interference) environments typical of industrial motor control centers. As an EPROM (Erasable Programmable Read-Only Memory) device, it provides an additional layer of safety; once programmed, the data is hardware-locked and cannot be accidentally overwritten by software errors or power surges. Modification of the code requires physical removal of the module and exposure to an ultraviolet (UV) erasing lamp followed by a dedicated Siemens S5 programming unit (PG), ensuring maximum protection for validated safety and process logic.

Detailed Technical Specifications

The following technical data details the operational and mechanical parameters for the 6ES5376-1AA31.