Siemens 6ES79521AM000AA0

Technical Parameters

Memory Capacity & Type

Provides 128 KB of non-volatile flash storage optimized for S7-300/S7-400 PLCs, designed to retain data for ≥10 years without power and withstand >100,000 write/erase cycles.

Data Security Features

Supports hardware-level write protection via a physical switch, preventing accidental overwrites, and integrates password encryption for project files using Siemens S7-specific AES-128 algorithms.

Hot-Swap Compatibility

Allows insertion/removal without powering down the PLC when used with CPUs supporting hot-swap (e.g., S7-400H), though initialization may require a restart in non-redundant systems.

File System Structure

Utilizes a proprietary FAT-based file system preformatted for Siemens PLCs, reserving 20% of storage for system files (e.g., diagnostics logs, firmware backups) inaccessible to user programs.

Functional Features

The Siemens 6ES79521AM000AA0 excels in real-time data retention and seamless integration:

4MB RAM Capacity: Stores critical program logic and process variables for SIMATIC S7-400 PLCs, enabling uninterrupted operations in 24/7 production lines like chemical batch processing .

Battery-Backed Data Retention: Equipped with a lithium battery (6ES7971-0BA00), the Siemens 6ES79521AM000AA0 preserves data for up to 2 years during power outages, minimizing downtime in pharmaceutical cleanroom operations .

Plug-and-Play Compatibility: Direct integration with TIA Portal V18 simplifies firmware updates and configuration for water treatment SCADA systems .

Associated Equipment

Maximize efficiency by pairing the Siemens 6ES79521AM000AA0 with:

SIMATIC S7-400 CPUs: For example, the 6ES7416-3XR05-0AB0 CPU leverages the memory card’s speed for large-scale automation in power grid management .

HMI Panels: Sync with 6AV2124-0MC01-0AX0 touchscreens to visualize real-time production metrics in food processing plants .

Redundant Systems: Combine with 6ES7400-1TA01-0AA0 interface modules for fail-safe data replication in oil refinery safety shutdown systems .

Practical Use Cases

The Siemens 6ES79521AM000AA0 addresses diverse industrial challenges:

Automotive Paint Shops: Stores robotic motion profiles and color formulas, ensuring precision in multi-stage喷涂 processes while withstanding paint mist exposure .

Steel Rolling Mills: Retains temperature calibration data and PLC logic for轧机 control, even in high-electromagnetic-interference zones .

Pharmaceutical Batch Tracking: Logs GMP-compliant production records for FDA audits, with tamper-proof data storage .