The FANUC A16B-2200-0913 is an Option 1 Remote Buffer PCB used in compatible legacy FANUC CNC control systems.

FANUC technical documentation identifies the exact A16B-2200-0913 board as providing the remote buffer communication function. It is an optional communication board rather than a main CPU PCB, servo-control board, or additional-axis controller.

Within a correctly configured FANUC control system, the remote buffer option supports communication between the CNC and compatible external data equipment. Depending on the controller, parameter settings, wiring, and interface configuration, the Option 1 board may use RS-232C or RS-422 communication through the designated board connector.

The remote buffer function can be used as part of an external CNC program and data-transfer arrangement. The board contains its own communication-processing section, and FANUC documentation describes startup, initialization, command-execution, ROM, RAM, bus, and communication-error states for the remote-buffer circuitry.

Organic search results commonly identify this model as:

• FANUC Remote Buffer PCB
• FANUC Option 1 Board
• FANUC RBI Board
• FANUC Remote Buffer Communication Board
• FANUC A16B-2200-0913 Control PCB
• FANUC F16/F18 Remote Buffer Board

It may be suitable for replacing a confirmed faulty option board associated with failed external CNC communication, remote-buffer initialization errors, loss of RS-232C or RS-422 communication, ROM or RAM alarms, bus errors, or physical damage to the PCB.

• Remote-buffer communication functions tested before shipment
  
• In stock and prepared for prompt dispatch
  
• Worldwide DHL, UPS, and FedEx shipping

Product Details

• Brand: FANUC
• Part Number: A16B-2200-0913
• Alternative Format: A16B22000913
• Official Function: Remote Buffer Communication
• Product Type: Option PCB / Communication Board
• Common Board Name: Option 1 Remote Buffer PCB
• Alternative SEO Name: RBI Board
• Communication Interfaces: RS-232C or RS-422, depending on configuration
• Documented Module ID: 3F in applicable control configurations
• Product Series: A16B-2200
• Application: Compatible FANUC CNC Control Systems
• Category: FANUC Communication PCB / CNC Option Board
• Testing: Inspected and tested under an applicable FANUC control configuration

FANUC documentation lists A16B-2200-0913 separately from graphic, DNC1, and combined-function Option 1 boards, confirming that this exact specification is the dedicated remote-buffer communication version.

Documented CNC Families

The A16B-2200-0913 appears in technical documentation for more than one FANUC control generation.

Documented references include:

• FANUC Series 15-B
• FANUC Series 16/160 Model B
• FANUC Series 18/180 Model B
• FANUC Series 21/210 Model B

Professional parts references also associate it with selected Series 16-A control racks. This suggests that the board number was used across several compatible legacy CNC structures rather than belonging exclusively to one controller family. Actual compatibility must still be confirmed from the original control, backplane, board revision, software, and option configuration.

For SEO, it is therefore safer to use FANUC Remote Buffer Option PCB as the primary name rather than limiting the title to “16-A,” “16/18,” or “21-B.”

Communication Interface Note

In a documented FANUC configuration, the Option 1 board connector can be assigned as an RS-232C or RS-422 interface, with the selected interface determined by the corresponding CNC parameter and system setup.

The complete communication arrangement may depend on:

• CNC system model
• Option-board software
• Remote-buffer option activation
• RS-232C or RS-422 selection
• Connector and cable pinout
• Baud rate
• Stop-bit configuration
• External computer or data device
• Foreground and background I/O-channel settings
• Machine-builder parameters

The presence of the A16B-2200-0913 board alone does not guarantee that the remote-buffer function is enabled or correctly configured.

Diagnostic Functions

FANUC manuals describe onboard status and alarm indications for the remote-buffer section. Depending on the displayed LED pattern, the board may indicate conditions such as:

• Remote-buffer CPU not running
• Initialization in progress
• Initialization completed
• Waiting for a CNC command
• Command being executed
• ROM parity alarm
• RAM test error
• Work-RAM parity alarm
• Bus or illegal-interrupt error
• Communication failure
• NMI received from another board

These indications can assist with diagnosis, but the board should not be replaced solely from one LED condition without checking cables, parameters, the backplane, external equipment, and related CNC boards.

Related FANUC Option 1 Boards

FANUC documentation distinguishes the A16B-2200-0913 from several visually related Option 1 PCBs:

• A16B-2200-0910: Graphic + Remote Buffer
• A16B-2200-0911: Graphic + DNC1
• A16B-2200-0912: Graphic Function
• A16B-2200-0913: Remote Buffer Communication
• A16B-2200-0914: DNC1 Communication
• A16B-2200-0915: Graphic + Remote Buffer with Graphic RAM
• A16B-2200-0918: Remote Buffer + Graphic Function with Additional Graphic RAM
• A16B-2200-0919: Graphic Function with Additional Graphic RAM

These boards provide different option combinations and should not be treated as automatically interchangeable.

In particular, A16B-2200-0913 and A16B-2200-0914 are not the same board: the former provides the remote-buffer function, while the latter is identified as the DNC1 communication version.

Compatibility Note

Before ordering the A16B-2200-0913, please verify:

• Complete FANUC PCB number
• Revision printed after the base model
• Original Option 1 board specification
• CNC system series and model
• Backplane or control-rack number
• Available option-board slot
• Remote-buffer software option
• RS-232C or RS-422 requirement
• Connector and communication-cable arrangement
• Communication parameters and baud rate
• External computer or data-transfer equipment
• Onboard ROM and mounted-component configuration
• Existing STATUS and ALARM LED indications

A board with the same base number but a different revision or mounted ROM configuration may not operate correctly without matching software and parameter settings.

Common Use Cases

• FANUC remote-buffer PCB replacement
• Restoration of external CNC program communication
• Troubleshooting RS-232C or RS-422 interface faults
• Repair of remote-buffer initialization errors
• Diagnosis of ROM, RAM, or bus alarms
• Replacement of a damaged Option 1 communication board
• Maintenance of legacy FANUC CNC control systems
• Preparation of a tested spare communication PCB

Sales & Support

Each A16B-2200-0913 Remote Buffer Option PCB is inspected and tested under an applicable FANUC CNC configuration before delivery.

Worldwide delivery is available through DHL, UPS, FedEx, and other express carriers. REACO CNC provides PCB repair service, warranty coverage, testing-video support, communication-configuration assistance, and technical support for FANUC CNC control boards.