Memory Card | Siemens | 6ES7954-8LC03-0AA0 SIMATIC S7 memory card 6ES7954-8LC03-0AA0

Product Description: Siemens 6ES7954-8LC03-0AA0

The Siemens 6ES7954-8LC03-0AA0 is a 64 KB Micro Memory Card (MMC) used for storing user programs, configuration data, and firmware in SIMATIC S7 programmable logic controllers. This MMC is essential for the operation of many S7-300 CPUs and also serves as a secure storage medium for backups, firmware upgrades, and user-defined parameter sets. Compact, reliable, and industrial-grade, it ensures long-term performance in automation environments.

Key Features

• 64 KB storage capacity
• Required for operation of most S7-300 CPUs
• Used for storing STEP 7 user programs and data
• Suitable for firmware updates and hardware diagnostics
• High data retention and write endurance
• Compact and rugged design for harsh industrial conditions

Technical Specifications

• Part Number: 6ES7954-8LC03-0AA0
• Memory Type: EEPROM-based Micro Memory Card (MMC)
• Memory Capacity: 64 KB
• Form Factor: MMC (Micro Memory Card)
• Compatible PLCs: SIMATIC S7-300, some ET 200M modules
• Data Retention: ≥10 years
• Write/Erase Cycles: ≥100,000
• Access Time: <0.5 ms
• Dimensions (W × H × D): Approx. 32 mm × 24 mm × 1.4 mm
• Weight: Approx. 5 g
• Operating Temperature: 0 °C to +60 °C
• Storage Temperature: –40 °C to +70 °C
• Certifications: CE, cULus, RoHS-compliant

Application Areas

• PLC program storage and transfer in S7-300 automation systems
• Configuration and parameter backup for factory machinery
• Firmware updates for Siemens S7 controllers
• Commissioning and maintenance of distributed automation equipment
• Redundant storage for safety-critical applications

Advantages

• Enables CPU program execution and data storage
• Reliable and durable for industrial use
• Compact and easy to replace or duplicate
• Essential tool for commissioning, diagnostics, and firmware management
• Fully compatible with Siemens TIA Portal and STEP 7 platforms