Siemens 6ES5373-1AA81 Memory Submodule

Technical Specifications and Memory Architecture

The Siemens 6ES5373-1AA81 memory submodule belongs to the SIMATIC S5 product family, specifically designed for the S5-130K programmable controller . This module stores user programs and system data essential for PLC operation. It serves as an EPROM memory submodule that retains data reliably after power loss. The module’s compact design measures approximately 14.0 cm x 8.0 cm x 2.5 cm and weighs about 0.15 kg . It interfaces with the CPU through a dedicated memory bus connection.

Parameter	Specification
Manufacturer	Siemens
Model Number	6ES5373-1AA81
Product Family	SIMATIC S5
Compatible PLC	S5-130K
Memory Type	EPROM
Function	User program and system data storage
Data Retention	Non-volatile (retains data after power loss)
Dimensions	14.0 x 8.0 x 2.5 cm
Weight	0.15 kg
Product Status	Obsolete

Functional Capabilities

The 6ES5373-1AA81 submodule provides reliable program storage for the S5-130K controller. It enables quick program loading during system startup. This memory module also safeguards the control logic during power interruptions. Users cannot modify the data on this EPROM without specialized programming equipment . Its compact footprint allows for straightforward installation in the CPU module.

Application Scenarios

This memory submodule suits facilities that still operate S5-130K-based automation systems . It supports professionals engaged in maintenance and refurbishment of legacy S5 equipment. The 6ES5373-1AA81 remains a critical component for preserving program integrity in these controllers. Many facilities rely on this module to sustain their existing automation infrastructure . It offers a practical solution for maintaining operational continuity.