SIEMENS 6ES5375-0LD31 SIMATIC S5 32KB RAM Memory Submodule for Legacy PLC Systems

Product Overview

The SIEMENS 6ES5375-0LD31 is a memory submodule designed for the legacy SIMATIC S5 programmable logic controller (PLC) family, serving as an essential component for program and data storage in industrial automation systems. As a long-form factor RAM module, the SIEMENS 6ES5375-0LD31 offers a total capacity of 32K bytes (organized as 2 x 16K bytes), providing reliable memory expansion for S5-series processors including the S5-115U, S5-135U, and S5-155U platforms. This memory submodule enables the storage of user programs, system parameters, and configuration data necessary for the proper operation of these legacy control systems.

The SIEMENS 6ES5375-0LD31 is part of the broader SIMATIC S5 memory submodule family, which includes various EPROM, EEPROM, and RAM options catering to different storage requirements and data permanence needs. As a CMOS-RAM module, the SIEMENS 6ES5375-0LD31 features battery-backed data retention, ensuring that critical program and parameter data are preserved even during power interruptions. This characteristic makes the SIEMENS 6ES5375-0LD31 particularly suitable for applications requiring frequent program updates or modifications, as RAM technology allows rapid read and write operations compared to ROM-based alternatives. Designed to be plugged directly into the CPU module or memory expansion slots of compatible SIMATIC S5 controllers, the SIEMENS 6ES5375-0LD31 provides a straightforward memory upgrade path for maintaining and supporting legacy automation installations that remain operational in numerous industrial facilities worldwide.

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Description

Technical Specifications

Parameter Name	Value
Product Model	SIEMENS 6ES5375-0LD31
Manufacturer	Siemens
Product Type	Memory Submodule / RAM Module
Platform	SIMATIC S5
Memory Capacity	32,768 bytes (32K)
Memory Organization	2 x 16 Kbytes
Memory Technology	CMOS-RAM with battery backup
Form Factor	Long type
Compatibility	S5-115U, S5-135U, S5-155U
Operating Temperature	-25°C to +60°C
Storage Temperature	-40°C to +85°C
Power Consumption	Typically less than 0.5 Watts
Dimensions (WxHxD)	22.5mm x 51mm x 26.5mm
Weight	Approx. 35g

Main Features and Advantages

Reliable Data Retention with Battery Backup: The SIEMENS 6ES5375-0LD31 incorporates CMOS-RAM technology with an integrated battery backup system, ensuring that stored program and parameter data remain intact during power interruptions. This feature is critical for maintaining system availability and preventing data loss in environments where power fluctuations or planned shutdowns occur. The battery-backed design of the SIEMENS 6ES5375-0LD31 eliminates the need for frequent reprogramming, saving valuable engineering time and reducing the risk of operational errors.

High-Speed Read/Write Capability: As a RAM-based memory module, the SIEMENS 6ES5375-0LD31 offers fast access times for both read and write operations, enabling efficient program execution and rapid data updates. This performance advantage makes the SIEMENS 6ES5375-0LD31 particularly suitable for applications requiring frequent program modifications or dynamic data storage. Unlike EPROM or EEPROM alternatives that require specialized programming equipment, the SIEMENS 6ES5375-0LD31 can be written and erased directly via the programming device (PG) or CP 521 BASIC communication processor, simplifying system maintenance and program updates.

Wide Compatibility Across S5 Platforms: The SIEMENS 6ES5375-0LD31 is designed to be compatible with multiple CPU modules within the SIMATIC S5 family, including the S5-115U, S5-135U, and S5-155U. This broad compatibility ensures that the SIEMENS 6ES5375-0LD31 can serve as a standardized memory solution across diverse legacy automation deployments, simplifying spare parts management for plant maintenance teams. The standardized slot interface of the SIEMENS 6ES5375-0LD31 allows for simple plug-in installation without requiring special tools or extensive system modifications.

Industrial-Grade Construction: Engineered for demanding industrial environments, the SIEMENS 6ES5375-0LD31 operates reliably across an extended temperature range of -25°C to +60°C and can be stored at temperatures from -40°C to +85°C. The compact, lightweight design of the SIEMENS 6ES5375-0LD31 facilitates installation even in space-constrained control cabinets. Its low power consumption profile ensures minimal heat generation and reduced operational costs, contributing to the overall energy efficiency of the automation system.