Description
The Siemens 6ES5374-0AA11 is a dedicated EEPROM-based memory submodule designed for the SIMATIC S5 series of programmable logic controllers, providing secure, battery-free storage for user programs, data blocks, and critical system parameters. As part of the S5 memory submodule family, this component plugs directly into compatible CPU units including the S5-90U, S5-95U, S5-100U, and S5-115U, ensuring that your control logic remains intact even after extended power outages .
Unlike volatile RAM solutions that rely on batteries, the Siemens 6ES5374-0AA11 leverages EEPROM technology to deliver true non-volatile storage. This eliminates the risk of program loss due to battery depletion or leakage—a common failure point that has caused countless production stoppages in legacy automation systems. For industries still operating S5-based machinery, this module represents the last line of defense against unexpected downtime caused by memory corruption or loss.
Application Scenarios
In a food processing plant running an S5-115U-controlled packaging line, the maintenance team discovered that the CPU’s backup battery had leaked, corroding the PCB and corrupting the entire user program. Production ground to a halt for 18 hours while engineers reloaded the program from a decade-old floppy disk. The solution was simple: replace the volatile RAM with a Siemens 6ES5374-0AA11 EEPROM submodule. Once installed, the control program was permanently stored without any battery dependency. Months later, when the facility experienced a week-long power outage due to a regional storm, the S5 CPU powered back on instantly with the program intact—saving the plant from another costly recovery effort .
Parameters
| Main Parameters | Value / Description |
|---|---|
| Product Model | Siemens 6ES5374-0AA11 (also 6ES5 374-0AA11) |
| Manufacturer | Siemens AG (SIMATIC S5 Series) |
| Product Category | Memory Submodule (Program/Data Storage) |
| Memory Type | EEPROM (Electrically Erasable Programmable Read-Only Memory) |
| Storage Capacity | 8 KB (User program and data area) |
| Data Retention | > 10 years (no battery required) |
| Write Cycle Endurance | 10,000 erase/write cycles typical |
| Operating Voltage | 5 V DC (supplied by CPU backplane) |
| Current Consumption | ~30 mA (typical) |
| Compatible CPUs | S5-90U, S5-95U, S5-100U, S5-115U |
| Operating Temperature | 0°C to +60°C |
| Mounting Type | Direct plug-in to CPU slot (front or side) |
