SIEMENS 6ES7953-8LL31-0AA0 memory card

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SIEMENS 6ES7953-8LL31-0AA0 Micro Memory Card

The SIEMENS 6ES7953-8LL31-0AA0 is a 2MB Micro Memory Card (MMC) designed for SIMATIC S7-300, C7, and ET 200 automation systems. It serves as non-volatile storage for PLC programs, configuration data, and firmware updates, ensuring data retention even during power loss. This 3.3V Flash-EPROM card is essential for backup, program transfer, and system recovery in industrial automation environments .

Key Features & Advantages

1. Reliable Data Storage

   • 2MB memory capacity, sufficient for small to medium PLC applications .

   • Flash-EPROM technology ensures 100,000 write/erase cycles and 10-year data retention .

2. Wide Compatibility

   • Works with SIMATIC S7-300 CPUs, C7 controllers, and ET 200 distributed I/O stations .

   • Supports firmware updates and program backups .

3. Compact & Robust Design

   • Dimensions: 24 × 32 × 1.4 mm, weight: ~2g .

   • Industrial-grade durability, resistant to vibration and shock .

4. Easy Integration

   • Plug-and-play installation into the CPU memory slot .

   • No battery backup required, reducing maintenance needs .

Technical Specifications

Applications

• Program backup & restoration for S7-300 PLCs .

• Firmware updates for automation systems.

• Data transfer between PLCs and engineering stations .

Installation & Usage Notes

• Insert carefully into the CPU’s MMC slot to avoid damage .

• Avoid static discharge when handling the card .

• Format via STEP 7 software before first use if required .

The structure and details of the product：

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