Siemens 6ES79521AL000AA0

Technical Parameters

Volatile Memory Architecture

Dual-port SRAM design with 64 KB capacity, supporting ≤35 ns access time for direct CPU addressing without block transfer delays.

Battery Backup Threshold

Integrated lithium cell (BR2032) maintains data for ≥10 years at 25°C, with automatic low-voltage detection (<2.7V) triggering diagnostic interrupt OB82.

Hardware Compatibility Matrix

Exclusively operates with CPUs featuring memory submodule slots: 6ES7315-2EH14-0AB0, 6ES7404-3XJ00-0AB0, and later firmware versions (≥V3.1).

Data Retention Security

Mechanical write-protect slider enforces hardware-level read-only mode, bypassing software-based protection vulnerabilities.

Shock-Resistant Design

MIL-STD-810G certified for 50g peak shock survival (11ms duration) in XYZ axes, using silicone-damped PCB mounting.

Key Functional Features

The Siemens 6ES79521AL000AA0 offers critical advantages for industrial data management:

High-Capacity Storage: Provides 24 MB of non-volatile memory, ideal for storing PLC programs, device configurations, and historical data logs without power dependency .

Data Security: Features write-protection mechanisms and encryption protocols to safeguard intellectual property and prevent unauthorized access, aligning with IEC 62443 cybersecurity standards .

Plug-and-Play Flexibility: Enables rapid deployment with automatic recognition by Siemens TIA Portal software, reducing setup time during system commissioning .

Associated Equipment

To maximize efficiency, pair the Siemens 6ES79521AL000AA0 with compatible Siemens automation components:

S7-1500 CPU Modules: Direct integration with CPUs like 6ES7517-3AP00-0AB0 ensures synchronized program execution and real-time data backup .

HMI Panels: Works with Siemens SIMATIC HMI KTP series for centralized data visualization and parameter adjustments in complex control systems .

I/O Modules: Combines with digital/analog signal modules (e.g., 6ES7134-6HB00-0CA1) to streamline data acquisition and processing in distributed architectures .

Practical Use Cases

The Siemens 6ES79521AL000AA0 excels in diverse industrial scenarios:

Automotive Assembly Lines: Stores robotic welding programs and quality control algorithms, ensuring uninterrupted production even during power outages .

Pharmaceutical Batch Processing: Retains precise formulation parameters and regulatory compliance logs for GMP-certified manufacturing environments .

Smart Warehousing: Supports AGV (Automated Guided Vehicle) navigation systems by storing route maps and inventory management protocols in logistics hubs .