3TH42830BF4 SIEMENS

3TH42830BF4 SIEMENS Memory Board, Dynamic

Product  Description：

A SIEMENS Dynamic Memory Board is a specialized hardware expansion module designed for legacy industrial automation equipment, numerical control systems (such as SINUMERIK), and Siemens proprietary industrial computers or controllers. Built around Dynamic Random-Access Memory (DRAM) architecture, these memory boards provide high-speed, volatile data storage used to expand execution memory, hold active system routines, run complex numerical control programs, and buffer real-time operational data required by the primary processor.

Product Specifications

• Memory Technology: High-density Dynamic RAM (DRAM) memory cells requiring periodic refresh cycles.

• Storage Capacity: Ranges from legacy 128 KB, 512 KB, and 1 MB configurations up to multi-megabyte capacities depending on the specific system family (e.g., SIMATIC S5, SINUMERIK 800 series, or early SIMATIC Industrial PCs).

• Bus Interface: Proprietary backplane bus connector or dedicated system memory socket designed for high-speed parallel data transfer to the main CPU.

• Access Time: Optimized low-latency bus response times matching processor cycle speeds (typically in the tens to hundreds of nanoseconds).

• Data Bus Width: Supports standard 8-bit, 16-bit, or 32-bit architecture alignments.

• Operating Voltage: Typically driven by standard 5 V DC or 3.3 V DC logic supply provided directly through the backplane slot.

• Form Factor: Modular PCB plugin board equipped with gold-plated edge contacts and rugged mechanical retention latches.

• Environmental Tolerance: Designed for cabinet installation with operating temperatures ranging from 0°C to +55°C.

Key Product Advantages

• High-Speed Execution: Delivers rapid read/write cycles essential for processing real-time control algorithms, fast axis movements, and complex automation sequences.

• Expanded Program Capacity: Allows industrial controllers to handle significantly larger user applications, extensive tool catalogs, and larger NC code files without lagging.

• Direct Bus Integration: Operates directly on the controller memory bus, minimizing communication overhead compared to serial or network-attached storage options.

• Seamless Compatibility: Engineered specifically for Siemens host equipment, ensuring optimal electrical matching, timing synchronization, and reliable system detection upon startup.

• Ruggedized Industrial Design: Built to withstand the thermal and electrical demands of factory environment cabinets better than commercial-grade memory modules.

Important Operational Considerations

• Volatile Memory Behavior: Dynamic RAM loses all stored data immediately when power is removed. Critical programs and parameters must be backed up by a non-volatile medium (such as EPROM/EEPROM modules or battery-backed static memory) or reloaded upon power-up.

• ESD Sensitivity: The board contains sensitive CMOS circuits and DRAM integrated circuits that can be easily damaged by electrostatic discharge. Handle using anti-static wrist straps and conductive packaging.

• Host System Compatibility: Memory timing, bus width, and mechanical keying vary strictly between system generations. Verify exact model numbers and jumper configurations before installation.

• Thermal Management: Ensure adequate airflow within the control cabinet, as densely populated dynamic memory chips generate heat during high-duty execution cycles.

• Clean Installation Protocols: Inspect backplane connector pins for dust or corrosion before seating the board. Avoid touching bare gold-finger contacts with un-gloved hands to prevent oxidation over time.

Industrial Applications

• CNC Machine Tools: Installed in SINUMERIK controller racks to store and execute large multi-axis G-code machining programs.

• Programmable Logic Controllers (PLCs): Expands system memory in high-end legacy controllers (such as SIMATIC S5 racks) handling high-volume I/O processing and complex sequence control.

• Industrial Process Computers: Used as system RAM in early Siemens industrial PCs and control terminals running real-time monitoring and visualization software.

• Motion Control Systems: Buffers trajectory, position calculation, and multi-axis coordination data in specialized motion hardware.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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