Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6ES5375-1LA41 |
| Manufacturer | Siemens AG |
| Product Type | Memory Submodule (Type 375) |
| Series | SIMATIC S5 |
| Memory Technology | CMOS-EPROM |
| Storage Capacity | 32 KB |
| Data Width | 8-Bit |
| Erasure Method | Ultraviolet (UV) Light Exposure |
| Programming | Requires Siemens PG Programming Device |
| Operating Voltage | 5V DC |
| Operating Temperature | 0°C to 60°C (typical) / -25°C to +70°C |
| Dimensions | Approx. 9.6 x 6.3 x 2.3 cm |
| Net Weight | Approx. 0.04 – 0.05 kg |
| Lifecycle Status | Discontinued (Legacy spare parts only) |
| RoHS Compliance | Not compliant (Contains Lead) |
Main Features and Advantages
The SIEMENS 6ES5375-1LA41 provides reliable, non-volatile program storage that is essential for mission-critical industrial automation environments where system continuity is paramount . Its CMOS-EPROM technology ensures data persistence even during power interruptions, safeguarding critical control logic and eliminating downtime risks associated with memory failures . The SIEMENS 6ES5375-1LA41 offers a storage capacity of 32 KB, which is suitable for storing moderate-sized user programs or system configurations for a wide range of S5-based applications . This module is designed for easy plug-and-play integration with SIMATIC S5 PLCs, simplifying installation and replacement .
Physical Protection and Read-Only Operation: A key advantage of the SIEMENS 6ES5375-1LA41 is its secure, read-only operational characteristic after programming. The EPROM technology provides a physical barrier against accidental software overwrites, data corruption, or malware, as the stored logic cannot be altered by system bus errors or unauthorized access . This feature is particularly valuable for protecting validated production code in critical industrial processes, ensuring that the control program remains unchanged and reliable over extended periods.
Legacy System Support and Lifecycle Extension: As the SIMATIC S5 series has been globally discontinued, the SIEMENS 6ES5375-1LA41 is now exclusively available through legacy spare parts channels. The SIEMENS 6ES5375-1LA41 enables system integrators and maintenance teams to extend the operational life of aging S5 installations while planning migration paths to modern architectures . Maintaining a stock of this memory module ensures spare part availability for long-term system support and minimizes operational disruptions caused by memory failures in critical infrastructure such as chemical processing, automotive assembly, water treatment, and power generation facilities . Its robust design, with a wide operating temperature range, ensures reliable performance in demanding industrial environments.
