AR40422S22 EATON

AR40422S22 EATON Memory Board, Dynamic

Product  Description：

A Dynamic Memory Board (often based on DRAM or similar technology) provides the fast, temporary storage required by the system processor. Unlike static memory, dynamic memory requires constant refreshing to retain data, hence the term "dynamic." These boards are crucial for the runtime execution of the control logic and managing the system's operational state. In legacy systems, they were typically housed in dedicated slots within the controller rack alongside the CPU.

Product Parameters (Typical)

Parameters are specific to the particular controller series (e.g., EATON/Westinghouse WDPF, ODC, or specific PLC lines).

• Memory Type: Typically Dynamic Random-Access Memory (DRAM).

• Memory Size: The total storage capacity of the board (e.g., 256 KB, 512 KB, 1 MB, 4 MB). This is critical for determining the maximum size of the application program and system data.

• Access Speed/Cycle Time: The speed at which the CPU can read from and write to the memory.

• Data Bus Width: The width of the data path used for communication with the CPU (e.g., 16-bit, 32-bit).

• Power Requirements: The voltage and current needed to power the module, including the power required for the continuous refresh cycle.

• Parity/Error Correction: May include parity checking or Error Correction Code (ECC) to ensure data integrity during operation.

• Mounting: Designed to fit into specific card slots (backplane) of the respective EATON/Westinghouse controller rack.

Product Advantages

• Fast Access: Dynamic memory provides sufficiently fast read/write access speeds necessary for real-time control applications.

• Cost-Effectiveness (Historically): At the time of their design, DRAM offered a higher density and lower cost per bit compared to static RAM (SRAM) for main program memory.

• System Compatibility: Designed specifically to integrate seamlessly with the target EATON/Westinghouse control system, ensuring proper bus timing and electrical interfacing.

• Field Replaceable: Allows for relatively easy replacement in the event of hardware failure, minimizing system downtime.

Precautions

• Electrostatic Discharge (ESD): Extreme care must be taken to prevent ESD damage. Memory chips are highly susceptible to static electricity, requiring proper grounding and anti-static procedures during handling.

• Power Requirements: Since dynamic memory is volatile and requires continuous refreshing, a stable, uninterrupted power supply is absolutely critical to prevent data loss.

• Insertion/Extraction: The board must be correctly aligned and firmly seated in the backplane connector to ensure reliable operation and prevent physical damage to the pins or backplane.

• Compatibility Check: Always verify the board's part number and revision level against the CPU module and system documentation to ensure full compatibility.

• System Backup: Before replacing or removing the memory board, ensure a complete and verified backup of the controller's application program and configuration data is saved externally, as dynamic memory will lose its contents upon power loss or removal.

Product Applications

EATON Dynamic Memory Boards are utilized in mission-critical industrial process control environments that rely on the associated EATON/Westinghouse DCS or PLC platform.

• Power Generation: Used in control systems for boilers, turbines, generators, and balance-of-plant equipment.

• Oil and Gas: Employed in monitoring and control systems for refineries, pipelines, and offshore platforms.

• Chemical and Petrochemical: Integrated into control systems managing complex chemical reactions, distillation processes, and blending operations.

• Water and Wastewater: Utilized in the central processing unit to manage real-time control of pumps, valves, and treatment processes.

• General Manufacturing: Found in older, large-scale automation systems managing continuous production lines.

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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