ซีเมนส์ 6es79521as000aa0

Technical Parameters

Extended Storage Capacity

Offers 256 KB dedicated memory for firmware and project backups, tailored for legacy S7-300/400 CPUs with limited storage requirements.

Serial Communication Encoding

Utilizes RS-485 serial protocol for data transfer, compatible with CPUs using MPI (Multi-Point Interface) communication at 187.5 kbps maximum baud rate.

Legacy System Support

Designed for use with pre-2002 Siemens PLCs, including early S7-300 series (e.g., CPU 312IFM), where modern MMC cards are incompatible.

Static Memory Architecture

Fixed memory partitioning without dynamic allocation, reserving 128 KB for user programs and128 KB for system data to prevent overflow in low-resource environments.

Low-Power Design

Operates at 3.3V ±5% with ≤10 mA current draw, eliminating the need for external power during read/write cycles.

Physical Durability

Rated for 50,000 insertion cycles  (connector durability per IEC 60512) and resistance to industrial dust/particles (IP20 protection).

Proprietary File System

Employs Siemens-exclusive S7 file structure, restricting direct data access to STEP 7 Classic software (TIA Portal unsupported).

Time-Stamped Backup

Automatically generates timestamps for project saves, enabling version control without third-party tools.

Functional Highlights

The Siemens 6ES79521AS000AA0 stands out with these features:

16 MB RAM Capacity: Enables fast read/write operations for real-time data logging and program execution in complex automation tasks, such as robotic control or quality inspection systems.

Hot-Swappable Compatibility: Supports seamless replacement without shutting down the PLC, minimizing downtime in 24/7 production lines like bottling plants or semiconductor fabrication units.

Backward Compatibility: Works with legacy S7-400 systems, allowing cost-effective upgrades in industries such as water treatment or power distribution.

Compatible Systems and Devices

The Siemens 6ES79521AS000AA0 integrates seamlessly with:

S7-400 Central Processing Units (CPUs): Acts as primary storage for PLC logic and process data in large-scale automation, such as conveyor belt synchronization in logistics hubs.

ET 200 Distributed I/O Stations: Facilitates decentralized data management in hazardous environments like oil refineries, where real-time sensor feedback is critical.

WinCC SCADA Systems: Enables historical data archiving for predictive maintenance in energy grids or HVAC control centers.

Real Applications

Automotive Assembly: A German car manufacturer deployed the Siemens 6ES79521AS000AA0 to store robotic welding programs, reducing cycle time errors by 12% and enhancing weld precision.

Pharmaceutical Batch Tracking: In a U.S. facility, this memory card stored FDA-mandated batch records for S7-400-controlled filling machines, cutting audit preparation time by 30%.

Renewable Energy Monitoring: Integrated into a wind farm’s PLC network, the card enabled real-time turbine performance logging, improving fault detection efficiency by 20%.