SIEMENS 6ES5375-1LA61 Memory Submodule for SIMATIC S5 PLC Systems

Product Overview

The SIEMENS 6ES5375-1LA61 is a CMOS-EPROM memory submodule specifically engineered for the SIMATIC S5 programmable logic controller (PLC) family, representing a vital storage component for legacy industrial automation systems. As part of Siemens’ distinguished 375 series memory modules, the SIEMENS 6ES5375-1LA61 provides reliable, non-volatile program memory that ensures user application code remains intact during power cycles and system interruptions . This memory submodule plays an essential role in maintaining operational continuity for S5-based installations that continue to perform critical functions across manufacturing, process control, and infrastructure applications worldwide.

Designed with the rigorous demands of industrial environments in mind, the SIEMENS 6ES5375-1LA61 features a storage capacity of 64 kilobytes, providing ample space for complex control logic, configuration parameters, and system operating data . This CMOS-EPROM variant offers the distinct advantage of non-volatile memory retention, eliminating dependency on backup batteries for data preservation—a critical consideration for facilities where power stability cannot be guaranteed or where long-term data integrity is paramount. The SIEMENS 6ES5375-1LA61 is engineered with high-quality semiconductor technology that ensures consistent read/write performance and extended operational life, even under challenging temperature conditions and electrical environments typical of industrial settings. Compatibility with the broader SIMATIC S5 ecosystem, including the S5-95U, S5-100U, S5-115U, and other CPU variants, makes the SIEMENS 6ES5375-1LA61 a versatile and reliable memory solution for maintaining, upgrading, or restoring legacy automation systems .

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Description

Technical Specifications

Parameter Name	Value
Product Model	6ES5375-1LA61
Manufacturer	Siemens
Product Type	Memory Submodule
Series	SIMATIC S5 375 Series
Memory Technology	CMOS-EPROM
Storage Capacity	64 KB
Programming Method	EPROM programmer required
Data Retention	Non-volatile (no battery required)
Applicable CPUs	S5-95U, S5-100U, S5-115U
Dimensions	62 x 96 x 24 mm
Weight	Approx. 0.051 kg
Alternative Part Number	6ES5 375-1LA61
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +70°C
Protection Class	IP20

Main Features and Advantages

The SIEMENS 6ES5375-1LA61 offers the critical advantage of non-volatile program storage, ensuring that user applications remain securely preserved without reliance on backup batteries or external power sources. This characteristic is particularly valuable for facilities that experience frequent power fluctuations or for systems where data integrity during unexpected shutdowns is a primary concern. Unlike RAM-based alternatives that require continuous power to retain information, the CMOS-EPROM architecture of the SIEMENS 6ES5375-1LA61 provides permanent, reliable storage that simplifies system maintenance and eliminates the need for periodic battery replacement routines .

The compact form factor of the SIEMENS 6ES5375-1LA61 facilitates straightforward installation and integration into existing S5 PLC systems. The module is designed to fit seamlessly into the dedicated memory slot on compatible CPUs, enabling rapid deployment without requiring extensive system modifications or downtime . Its lightweight construction—approximately 51 grams—minimizes mechanical stress on the CPU socket and ensures reliable long-term connection integrity in high-vibration industrial environments . The module’s robust engineering and adherence to Siemens’ stringent quality standards provide assurance of consistent performance and extended service life.

For maintenance and operational efficiency, the SIEMENS 6ES5375-1LA61 supports straightforward program updates and modifications through compatible Siemens programming devices. This flexibility allows engineering teams to implement control logic improvements, parameter adjustments, or system upgrades with minimal disruption to production activities. Additionally, the module’s compatibility with the complete S5 product line ensures that the SIEMENS 6ES5375-1LA61 serves as a reliable direct replacement for original memory submodules, making it an ideal choice for equipment restoration and legacy system preservation initiatives.