PLC | Siemens | 6ES7953-8LF20-0AA0 6ES7 953-8LF20-0AA0 SIMATIC S7 Micro Memory Card

Product Description: Siemens 6ES7953-8LF20-0AA0

The Siemens 6ES7953-8LF20-0AA0 is a Micro Memory Card (MMC) designed for use with SIMATIC S7-300 CPUs. With a storage capacity of 2 MB, it serves as the essential load memory for program and data storage in compatible S7-300 CPU modules. This MMC is required for CPU startup and operation, as the CPU loads and executes the user program directly from the card. It offers non-volatile storage, meaning that data is retained even when power is removed. The MMC also supports firmware updates and diagnostic functions in S7-300 systems.

Key Features

• 2 MB Capacity: Suitable for medium-sized control programs and data blocks.
• Non-Volatile Memory: Retains all data and programs without the need for a battery.
• Essential for CPU Operation: Required for S7-300 CPU startup and program execution.
• Firmware Upgrade Support: Can be used to update CPU firmware versions.
• Compact and Robust: Industry-grade card built for long-term use in automation environments.
• Plug-and-Play: Easily inserted into the MMC slot of supported CPU modules.

Technical Specifications

• Product Type: Micro Memory Card (MMC)
• Part Number: 6ES7953-8LF20-0AA0
• Series: SIMATIC S7-300
• Storage Capacity: 2 MB
• Form Factor: MMC (proprietary Siemens format)
• Voltage Supply: Powered via CPU slot
• Compatibility: S7-300 CPUs with MMC slot
• Data Retention: Non-volatile
• Functions Supported: Program storage, firmware update, diagnostics
• Operating Temperature: 0°C to +60°C
• Weight: Approx. 10 g

Application Areas

• Program Storage: Holds the complete user program for S7-300 automation tasks.
• CPU Initialization: Required for startup and operation of S7-300 CPUs.
• Data Logging: Stores process values, setpoints, and configuration parameters.
• System Backup: Used to transfer and archive automation projects.
• Firmware Maintenance: Supports CPU firmware upgrades for system updates.

Advantages

• Reliable Program Storage: Ensures secure and permanent retention of critical control logic.
• Plug-and-Operate: Simplifies replacement and commissioning of automation hardware.
• Long Service Life: Industrial-grade design withstands repeated write cycles.
• Compatible with Siemens Engineering Tools: Easily integrated with STEP 7 and TIA Portal.
• Essential for Operation: Required memory component for S7-300 CPU functionality.