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Product Overview
This memory card serves as the primary storage medium for SIMATIC S7-300 and C7 series controllers. It provides 64 MB of flash memory for storing user programs and system data. The card uses a durable MMC (MultiMediaCard) format for reliable industrial applications. It measures 32 mm in width, 24 mm in height, and 1.4 mm in thickness. The device weighs approximately 2 grams for effortless handling during installation. You can insert this card into any compatible CPU without requiring special tools.
The memory card retains all data without a backup battery for unlimited duration. It supports firmware updates for connected CPUs through the programming software. You can transfer complete project files between multiple controllers using this card. The device also stores diagnostic buffers and recipe data for production processes. Its robust construction withstands vibrations and shocks in industrial environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Memory Card (MMC) |
| Model | 6ES7953-8LF00-0AA0 |
| Memory Size | 64 MB (flash) |
| Format | MMC (MultiMediaCard) |
| Compatibility | S7-300, C7 series CPUs |
| Data Retention | Unlimited (without battery) |
| Read/Write Cycles | > 100,000 |
| Storage Temperature | -40 °C to 85 °C |
| Operating Temperature | -25 °C to 70 °C |
| Dimensions (W x H x D) | 32 mm x 24 mm x 1.4 mm |
| Weight | Approx. 2 g |
| Data Transfer Rate | Up to 2 MB/s |
| Firmware Update | Yes (via STEP 7) |
| Hot-Swap Support | No (power off required) |
Key Features and Benefits
This memory card provides a cost-effective solution for program backup and system recovery. Its large storage capacity accommodates complex applications with extensive data logging. The card simplifies machine duplication by copying projects across multiple CPUs. You can store multiple program versions and switch between them easily. The flash technology eliminates the risk of data loss during power failures.
Installation and Usage
You insert the card into the CPU’s designated slot with the label facing upward. The controller automatically recognizes the card during the next power-up cycle. You can format the card directly through the STEP 7 programming software. The system will load the program from the card when the CPU powers on. For program changes, you can overwrite the existing data using the programming interface. Always power down the CPU before removing or inserting the memory card.
Typical Applications
Machine builders use this card for shipping pre-programmed controllers to customers. Maintenance teams rely on it for rapid system recovery after hardware failures. The card also serves for storing production recipe data on multi-product lines.