A20B-8201-0020 FANUC PROFINET 4-Port Communication Board

The A20B-8201-0020 is a FANUC PC board / communication board, commonly described as a PROFINET 4-port card. It is used in compatible FANUC CNC or industrial control systems for PROFINET communication, network interface connection, and machine communication expansion.

This model is supplied as a FANUC PROFINET communication board, not a complete CNC control system, complete drive unit, or complete communication system. Correct board number confirmation, PROFINET configuration checking, CNC system compatibility verification, connector layout confirmation, and professional testing are important before replacement.

Worldwide Shipping & REACO CNC Service

• Worldwide Shipping: We can ship worldwide by DHL, UPS, FedEx, or other available logistics channels.
• Fast Handling: In-stock items can usually be shipped within 1-2 working days after payment.
• 100% Tested Before Delivery: Each qualified communication board is tested or checked before shipment. Product photos or a test video can be sent before delivery when required.
• REACO Warranty: New or refurbished products usually include a 1-year warranty, and used 90% new products usually include a 3-month warranty.
• Free Technical Support: Our team can help with basic model confirmation, board matching, and replacement guidance.

Product Information

Product Application

The FANUC A20B-8201-0020 PROFINET 4-port communication board is mainly used for compatible FANUC CNC or industrial control equipment communication applications. It may be required when the original PROFINET card is damaged, unstable, disconnected, or causing network communication, fieldbus, data transfer, or machine interface-related faults.

Because this is a board-level communication component, replacement should be carried out after confirming the original board number, CNC system model, PROFINET communication configuration, connector layout, network settings, and alarm or communication error details.

PROFINET 4-Port Communication

The A20B-8201-0020 is described as a PROFINET 4-port card. This type of communication board is used for PROFINET network connection and communication expansion in compatible FANUC systems.

Before replacement, please confirm the original card model, number of ports, network configuration, system compatibility, and wiring condition. Incorrect card selection or configuration mismatch may cause communication errors, network failure, I/O response problems, or CNC system alarms.

Quality Control and Testing

For FANUC PROFINET communication boards, careful checking is very important before shipment because board condition may directly affect CNC network communication, fieldbus connection stability, data transfer, machine operation, and system reliability. REACO CNC checks qualified products carefully and can provide real product photos or a test video before delivery when required.

Our goal is to help customers receive reliable FANUC CNC spare parts with clear product information, careful inspection, responsive after-sales support, and practical technical assistance.

Compatibility Confirmation

Before ordering, please confirm that the full board number on your original PCB is A20B-8201-0020. Similar FANUC communication boards may have different interface types, hardware versions, connector layouts, port counts, CNC system compatibility, fieldbus settings, or software requirements.

Please pay special attention to the PROFINET interface and 4-port description. If you are not sure whether this FANUC PROFINET communication board is suitable for your machine, please send photos of the original board label, connector side photos, CNC system model, communication configuration, network wiring, and alarm information. REACO CNC can help check the details before purchase.