A9F79110 SCHNEIDER

A9F79110 SCHNEIDER Memory Board, Dynamic

Product  Description：

Schneider Electric Dynamic Memory Boards, primarily utilized in high-performance Modicon control systems such as the Quantum and Premium series, are specialized hardware expansion modules. These boards provide high-speed, volatile memory (typically SRAM or DRAM) designed to expand the central processing unit's capacity for running active application programs, managing dynamic variables, and storing real-time process data. They ensure the controller has sufficient high-speed workspace to handle extensive logic, complex calculations, and heavy communication buffers without experiencing scan-time degradation.

Product Parameters

The technical specifications of Schneider Electric Dynamic Memory Boards are optimized for high-speed read and write operations directly linked to the CPU instruction cycles:

• Memory Capacity: Available in various sizes, ranging from 512 kilobytes for legacy units up to 16 megabytes or more for high-end process controllers.

• Memory Architecture: Utilizes high-speed dynamic or static RAM configurations designed for zero-wait-state access by the primary microprocessor.

• Interface Type: Features standard PCMCIA slot form factors or proprietary multi-pin board-to-board connectors depending on the specific CPU architecture.

• Data Backup: Integrated auxiliary lithium battery slot on the board or utilizing the CPU's backplane battery to prevent data loss during main power outages.

• Retention Life: Typically provides up to 1 to 5 years of continuous data retention when powered solely by a fresh backup battery.

• Write Endurance: Unlimited read and write cycles, a critical parameter for dynamic registers and active program variables that change multiple times per second.

Product Advantages

Schneider Electric Dynamic Memory Boards offer substantial performance benefits for complex automation architectures:

• Eliminates CPU Bottlenecks: By significantly expanding the available execution workspace, these boards prevent memory overflow errors in highly complex programs.

• Fast Execution Times: The high-speed design ensures that expanding the memory does not introduce physical latency into the controller's logic execution path.

• Robust Data Protection: Battery-backed structures guarantee that critical recipe parameters, active process states, and event logs are safely retained during unexpected power cuts.

• Simple Plug-and-Play Installation: Designed for direct insertion into designated CPU slots, where they are automatically recognized and configured by the system firmware without complex setup.

• Industrial-Grade Durability: Engineered with rugged components to withstand high levels of electrical noise, vibration, and thermal stress inside industrial control cabinets.

Product Applications

These memory expansion boards are critical in hardware setups managing data-intensive or highly complex tasks:

• Large-Scale Recipe Management: Storing detailed product manufacturing recipes that require rapid swapping and parameter adjustment on the fly.

• Local Data Logging and Buffering: Serving as temporary high-speed buffers for process trends, alarm histories, and system events before transmission to a plant historian.

• Complex Function Block Execution: Providing the extensive memory tracking required for running heavy mathematical models, PID loops, and sequential function charts.

• Multi-Device Communication Routing: Allocating memory space for extensive network routing tables, active socket connections, and large Modbus register mapping.

• Custom Subroutine Execution: Holding large compiled libraries and customized user-defined function blocks (DFBs) utilized across multiple program sections.

Important Precautions

To protect the memory board and avoid catastrophic loss of operational program data, the following practices must be followed:

• Power-Off Insertion and Removal: Never insert or remove the memory board while the CPU rack is energized. Doing so can cause electrical arcing, permanently damaging the memory board and the CPU card.

• Battery Voltage Monitoring: Regularly inspect and replace the backup battery according to the scheduled maintenance cycle. Letting the battery drain completely will lead to a loss of all stored dynamic variables upon a power cycle.

• ESD Static Protection: These boards contain highly sensitive semiconductor components. Always touch a grounded metal object or wear a grounded anti-static wrist strap before handling the board.

• Proper Alignment and Insertion: Do not force the board into the slot. Inspect the alignment guides and connector pins to ensure there are no bent pins before pushing the board firmly into place.

• Matching Firmware Compatibility: Verify that the CPU firmware and the engineering software version support the specific capacity and model of the dynamic memory board being installed.

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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JUSTWELL PTE. LTD

Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.