The 6ES7953-8LP31-0AA0 is a SIMATIC Micro Memory Card (MMC) from Siemens, specifically engineered as a high-capacity non-volatile storage solution for SIMATIC S7-300 and S7-400 series programmable logic controllers (PLCs). It is critical for storing the operational data required to run complex automation systems reliably.
Key Specifications & Features:
- Storage Capacity: Provides 256 MB of flash memory, offering substantial space for large-scale user programs, intricate configuration data (including hardware settings, network parameters, and process variables), and auxiliary files needed for advanced industrial automation tasks.
- Core Function: Serves as the primary storage medium for S7-300/S7-400 CPUs, which lack internal program memory. During startup, the CPU retrieves its operating program, system configurations, and data blocks directly from the MMC, ensuring consistent operation and preserving data even when power is disconnected.
- Compatibility: Designed for seamless integration with SIMATIC S7-300 CPUs (e.g., models 312, 314, 315, 317) and selected S7-400 CPUs, aligning with their programming and operational requirements.
- Industrial-Grade Reliability: Built to withstand harsh industrial environments, with resistance to vibration, shock, and electromagnetic interference (EMC) in compliance with international standards (such as IEC 61131-2). It operates reliably within a temperature range of -25°C to +70°C, making it suitable for demanding settings like manufacturing plants and process facilities.
- Data Integrity: Utilizes robust flash memory technology to ensure long-term data retention (typically up to 10 years without power) and supports numerous read/write cycles, ensuring durability in continuous operation.
- User-Friendly Design: Features a compact form factor for easy insertion and removal from the CPU’s memory card slot. It integrates with Siemens TIA Portal (STEP 7) software, enabling engineers to efficiently transfer, update, or back up controller data.
Applications:
Essential for S7-300/S7-400-based automation systems across industries such as automotive manufacturing, heavy machinery, process control (chemicals, pharmaceuticals), and logistics. It excels in storing and executing large or highly complex control programs, supporting tasks from multi-axis synchronization to intricate process regulation, and facilitating easy maintenance of PLC-based systems.
In summary, the 6ES7953-8LP31-0AA0 is a high-reliability 256 MB MMC card, critical for enabling advanced program storage and reliable operation of SIMATIC S7-300/S7-400 CPUs in large-scale industrial automation environments.
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