The FANUC A16B-3200-0320 is a Main CPU PCB and Master PCB used in compatible Series 16i/160i Model A stand-alone CNC control units.

FANUC CNC parts documentation identifies the A16B-3200-0320 as the 16i Main CPU Board, with hardware identification code E8. It is listed within the stand-alone control-unit structure covering the Series 16i and 160i platforms.

The board forms the central hardware platform onto which the required CPU, display-control, axis-control, memory, and other CNC modules are installed. Its actual machine-control capabilities depend on the cards, memory modules, software, options, and parameters fitted to the supplied board.

Organic product results commonly describe this model as:

• FANUC 16i/160i-A Main CPU PCB
• FANUC Series 16i Master PCB
• FANUC A16B-3200-0320 Main Board
• FANUC Stand-Alone CNC CPU Board
• FANUC CNC Control PCB.

The A16B-3200-0320 may be used to replace a confirmed faulty board associated with CNC startup failure, CPU or system alarms, intermittent control operation, failure to recognize installed cards, communication faults, or physical damage to the PCB.

• Main-board startup and 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-3200-0320
• Alternative Format: A16B32000320
• Official Product Type: Main CPU Board
• Board Classification: Master PCB
• Hardware Identification: E8
• CNC Family: FANUC Series 16i/160i
• Control Generation: Model A
• Control Structure: Stand-Alone CNC Control Unit
• Product Series: A16B-3200
• Application: Compatible FANUC CNC Control Systems
• Category: FANUC Main Board / CNC CPU PCB
• Available Configuration: Bare, partially populated, or fully populated, subject to stock
• Testing: Inspected and tested under an applicable FANUC control configuration

FANUC’s parts table identifies the exact board as the Series 16i Main CPU Board and separately associates the stand-alone basic-unit structure with Series 16i/160i controls.

Stand-Alone Control Clarification

The term stand-alone describes the physical FANUC CNC control-unit architecture.

It does not mean that the A16B-3200-0320 can operate as an independent controller without the rest of the CNC hardware. A complete configuration may require:

• CPU card
• DRAM, SRAM, and FROM memory
• Axis-control card
• Display-control card
• CNC system software
• PMC ladder and parameters
• Servo and spindle software
• Communication or optional interface boards
• Compatible power supply and back panel

The final functions of the board therefore depend heavily on how it is populated and configured.

Documented Card Options

FANUC’s parts documentation lists several card types that may be installed within this generation of control system.

Examples include the following CPU cards:

• A20B-3300-0050
• A20B-3300-0070
• A20B-3300-0170

Documented display-control options include:

• A20B-3300-0161: LCD/MDI display control
• A20B-3300-0162: CRT Link configuration
• A20B-3300-0190: MDI-only configuration

Several axis-control cards are also listed for four-, six-, and eight-axis configurations, depending on the applicable servo software. These are possible system components and are not guaranteed to be included with every A16B-3200-0320 board.

Related Basic Units

The FANUC stand-alone Model A parts structure lists these basic units for the Series 16i/160i family:

• A02B-0265-B501: Basic Unit with One Slot
• A02B-0265-B503: Basic Unit with Three Slots

The A16B-3200-0320 main board should be matched with the original cabinet, back panel, slot arrangement, and installed card configuration.

Similar Main CPU Boards

FANUC documentation distinguishes the following related Master PCBs:

• A16B-3200-0320: Series 16i Main CPU Board, ID E8
• A16B-3200-0325: Series 18i Main CPU Board, ID E9
• A16B-3200-0326: Series 21i Main CPU Board, ID EA.

Although these boards belong to the same hardware generation and may appear similar, they should not be treated as interchangeable.

A later FANUC parts listing also identifies A16B-3200-0420 as another Series 16i main CPU board. This is a separate, later hardware specification and is not an automatic substitute for A16B-3200-0320.

Board Configuration Note

The same A16B-3200-0320 base number may be found with different mounted modules and PCB revisions.

A supplied board may be:

• Bare Master PCB
• Partially populated board
• Board with CPU and memory modules
• Fully populated CNC main-board assembly
• Board configured for a specific machine or software edition

The exact suffix or revision printed after the base model should be checked. Pricing and compatibility may also differ substantially depending on which CPU, memory, axis, and display-control cards are included.

Data Backup and Programming Warning

Before removing the original main CPU PCB, all accessible CNC data should be backed up.

Depending on the machine and installed modules, this may include:

• CNC parameters
• PMC ladder and PMC parameters
• Machining programs
• Macro programs and variables
• Tool-offset data
• Work-coordinate data
• Pitch-error compensation
• Servo and spindle parameters
• Keep relays, timers, and counters
• System software information
• CNC option information
• Ethernet and communication settings
• SRAM and memory-card backups

A bare replacement Master PCB does not include the original machine configuration. The original cards may need to be transferred, or the relevant software and data may need to be restored before the CNC can start and operate normally.

Third-party product references commonly warn that programming and parameter restoration may be required after replacement.

Compatibility Note

Before ordering the A16B-3200-0320, please verify:

• Complete FANUC PCB number
• PCB revision printed after the base number
• Series 16i or 160i control model
• Model A stand-alone control structure
• One-slot or three-slot basic-unit configuration
• Original CPU-card number
• DRAM, SRAM, and FROM modules
• Display-control card
• Axis-control card and number of axes
• Servo and spindle software versions
• Installed CNC options
• Back-panel and connector configuration
• Availability of the original machine-data backup
• Whether a bare or populated board is required

Matching only the base part number is not always sufficient when the supplied board has a different hardware revision or module configuration.

Common Use Cases

• FANUC Series 16i main CPU board replacement
• Series 160i CNC control-unit restoration
• Troubleshooting CNC startup or CPU alarms
• Repair of intermittent control-system operation
• Diagnosis of card-detection or communication faults
• Transfer of original CPU and memory modules
• Replacement of physically damaged PCB circuitry
• Rebuilding a stand-alone Model A CNC control unit
• Preparation of a tested spare main board

Sales & Support

Each A16B-3200-0320 Main CPU PCB is inspected and tested under an applicable FANUC CNC configuration before delivery.

The supplied card and memory configuration will be confirmed before shipment. REACO CNC provides PCB repair, warranty coverage, testing-video support, configuration assistance, and technical guidance for FANUC CNC control systems.

Worldwide delivery is available through DHL, UPS, FedEx, and other express carriers.