Application Scenarios
A material handling facility relied on a Siemens S5-95U PLC to control a 24/7 conveyor system. The original CPU relied on battery-backed RAM for program storage. When a backup battery failure caused complete program loss during a weekend shutdown, the plant lost an entire production day to re-downloading and re-commissioning the logic.
The maintenance team replaced the volatile RAM with the SIEMENS 6ES5375-0LC11 EEPROM submodule . Once the program was burned onto the EEPROM, the CPU no longer depended on a battery to retain its logic. After subsequent power outages, the system restarted immediately with its program intact—eliminating costly downtime and manual reload operations. The 6ES5375-0LC11 effectively transformed a battery-dependent CPU into a maintenance-free, robust controller suited for continuous operations.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | SIEMENS 6ES5375-0LC11 (Order No. 6ES5 375-0LC11) |
| Manufacturer | Siemens (SIEMENS AG) |
| Product Category | MS375 Memory Submodule (EEPROM) |
| Memory Capacity | 2 KB (approx. 384 program elements) |
| Memory Type | EEPROM (Electrically Erasable Programmable Read-Only Memory) – non-volatile |
| Form Factor | Long Type module |
| Operating Voltage | DC 5 V (from CPU backplane) |
| Operating Temperature | -25°C to +60°C (extended industrial range) |
| Storage Humidity | 5% to 95% RH, non-condensing |
| Dimensions | Approx. 38.1mm × 24.3mm × 10.1mm |
| Weight | Approx. 2.5 g |
| Compatible CPUs | S5-95U, S5-100U, S5-115U (and other S5 models supporting EEPROM submodules) |
Technical Principles and Innovative Values
Innovation Point 1: Non-Volatile EEPROM for Battery-Free Program Retention
The SIEMENS 6ES5375-0LC11 employs EEPROM technology that retains stored data without any backup power source. Once the user program is written (or “burned”) onto the module, it remains intact for decades, immune to power failures, battery depletion, or accidental battery removal. This eliminates the “lost program” scenario that plagues battery-backed RAM systems .
Innovation Point 2: Write-Protected Program Integrity
When a program is stored on the 6ES5375-0LC11, the S5 CPU treats the memory as read-only. According to Siemens documentation, in EPROM/EEPROM mode, the user memory becomes write-protected for both PG access and write access by the user program . This means the logic cannot be accidentally overwritten by a faulty program instruction or unauthorized field modification—a critical security and reliability feature in regulated industries.
Innovation Point 3: Optimized for S5-95U Compatibility
The 6ES5375-0LC11 is one of the officially released EEPROM modules for the S5-95U (6ES5 095-8MD03) and other compact S5 CPUs . Its 2KB capacity is ideally sized for small-to-medium control programs typical of these systems, providing the perfect balance between storage capacity and CPU compatibility.
Innovation Point 4: Wide-Temperature Robust Design
Rated for -25°C to +60°C operation, the SIEMENS 6ES5375-0LC11 performs reliably in extreme industrial environments—from cold storage facilities to hot manufacturing floors. Its 5% to 95% humidity tolerance further ensures dependable operation in harsh, moisture-prone settings without performance degradation .
