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The Siemens 6ES7953-8LL11-0AA0 provides reliable non-volatile storage for S7-300 and S7-400 controllers. This Micro Memory Card stores user programs, configuration data, and firmware updates. It operates as the primary program memory for the CPU. You will retain all data during power loss without external batteries. This card ensures fast program transfer and system startup times.
Storage Capacity and Memory Specifications
This memory card offers 8 MB of flash memory for program storage. It holds approximately 8,000 to 20,000 program lines depending on code complexity. The Siemens 6ES7953-8LL11-0AA0 includes a high-speed read/write interface for quick access. It supports a minimum of 100,000 write cycles for long service life. The card provides data retention for over 10 years without power.
Physical Dimensions and Card Format
This Micro Memory Card features a standard SIMATIC form factor for S7 CPUs. It measures 22 mm in height and 18 mm in width. The card thickness reaches 2.5 mm for robust construction. It weighs approximately 0.005 kilograms for easy handling. The operating temperature ranges from 0°C to +60°C. This range suits typical industrial control room conditions.
Compatibility and System Integration
The Siemens 6ES7953-8LL11-0AA0 works with all S7-300 and S7-400 CPUs. It also supports C7, ET 200S, and ET 200X systems with CPU functionality. The card operates with firmware versions that support 8 MB storage capacity. You can use the card for program download and firmware updates. It also serves as a boot medium for the CPU.
Data Security and Write Protection
This memory card includes a mechanical write-protect switch for data security. The switch prevents accidental program modifications during operation. The Siemens 6ES7953-8LL11-0AA0 employs error correction codes for data integrity. These codes detect and correct single-bit errors automatically. The card also supports password protection through CPU settings.
Application and Usage Scenarios
You use this card to store the complete user program and hardware configuration. It holds DBs, FBs, FCs, and OB blocks effectively. The Siemens 6ES7953-8LL11-0AA0 enables fast program transfer between CPUs. You can keep multiple cards for different project versions. This approach simplifies field upgrades and system rollbacks.
Technical Specifications Summary
| Parameter | Specification |
|---|---|
| Memory Type | Flash, non-volatile |
| Capacity | 8 MB |
| Write Cycles | 100,000 minimum |
| Data Retention | 10+ years |
| Dimensions | 22 mm × 18 mm × 2.5 mm |
| Weight | Approx. 0.005 kg |
| Operating Temp | 0°C to +60°C |
| Compatibility | S7-300, S7-400 CPUs |
| Security | Write-protect switch, ECC |
System Performance and Benefits
The Siemens 6ES7953-8LL11-0AA0 significantly reduces program download times. It enables fast CPU startup and program execution. This card eliminates the need for battery-backed RAM modules. You gain reliable and maintenance-free program storage with this card.