FANUC A20B-2900-0553 128KB DRAM Memory board

Buy online your FANUC A20B-2900-0553 128KB DRAM Memory board from our US e-store Cnc-shopping USA, specialist in CNC machine-tools spare parts.

The FANUC A20B-2900-0553 is a 128KB DRAM memory board designed for compatible FANUC CNC controls. It provides the volatile working memory required by the CNC CPU for program execution, runtime buffers, and data processing, making it an effective replacement part for maintenance, repair, and retrofit applications.

When a faulty memory board causes issues such as RAM or parity alarms, random system resets, intermittent crashes, or unstable machine behavior, replacing it with the A20B-2900-0553 can restore normal CNC operation and ensure reliable execution of part programs and background tasks.

The board installs in the dedicated memory slot of the compatible FANUC CPU or sub-CPU module. Correct fitment should be confirmed by matching the A20B-2900-0553 reference number and the host board slot configuration. It is commonly used as a spare part for legacy and mid-generation FANUC controls to recover systems affected by memory-related faults.

Manufactured in Japan to FANUC standards, this memory board is suitable for machining centers, lathes, and grinding machines equipped with compatible FANUC systems. Its drop-in design allows maintenance teams to restore machine uptime quickly with minimal changes to existing software settings.

Each board is tested by qualified engineers using CNC simulators or dedicated test benches, packaged in anti-static protective materials for industrial shipping, and supplied with applicable warranty coverage. Repair, exchange, refurbished, and obsolete-part sourcing services are also available to help keep older FANUC-controlled machines operating reliably while minimizing production downtime.

Frequently asked questions about A20B-2900-0553:

How can I confirm compatibility with my FANUC control
Match the full PCB code on your existing board with A20B-2900-0553 and verify the connector and slot coding on the host CPU. If needed, share photos of the installed board and control ID plate for a check before purchase.

Does replacing this board affect parameters or programs
This is DRAM that provides working memory for runtime tasks, it does not store parameters when power is off. Always keep a valid backup of parameters and programs before any hardware work to simplify recovery if the control requests initialization.

Is this a direct field replacement
When the host CPU supports this reference it installs as a straightforward swap. After installation the control should boot and run memory tests, any further setup depends on the specific control model and site practices.

Can I order new, refurbished or exchange units
Depending on inventory, options may include refurbished units, exchange service and repair service. Contact us for the best lead time and worldwide shipping solutions for your maintenance schedule.