Used Fanuc Board A16B-3200-0040 A16B32000040 A16B-32OO-OO4O

A16B-3200-0040 | FANUC RJ-2 Robot Main CPU PCB — 24VDC / 0.84kg / Data Processing / Slot Mount / RJ2 Series Controller

RJ-2 — A Generation of FANUC Industrial Robots

The FANUC RJ-2 (Robot J-2) controller represents a key generation in FANUC's industrial robot product history. The RJ-2 powered a broad range of FANUC industrial robot bodies — from compact arc welding robots to large payload material handling robots — providing the processing backbone for 6-axis motion control, peripheral device coordination, and teach pendant communication.

The A16B-3200-0040 is the main CPU board at the heart of the RJ-2 controller — the board that orchestrates all controller functions. As the master board, it handles:

Data processing: The primary function confirmed in the product specification. All position data, trajectory calculations, and system state data flow through this board. The robot's motion is only as reliable as the CPU board executing the motion commands.

Controller communication: The main CPU board manages the communication between the teach pendant, the peripheral I/O interface, and external equipment connected to the robot.

System coordination: Motor servo commands, sensor feedback, safety monitoring, and programme execution are all coordinated from the main CPU board.

Key Specifications

Slot Mount Installation

The "slot mount" installation method confirms the A16B-3200-0040 occupies a defined card cage slot in the RJ-2 controller. Replacement procedure:

1. Power down the controller and ensure all safety procedures are followed
2. Locate the main CPU card cage within the controller cabinet
3. Extract the A16B-3200-0040 from its slot
4. Insert the replacement board into the same slot
5. Restore power and verify robot system initialisation

Data stored in external memory (SRAM, FROM) and on daughter boards is preserved through the CPU board replacement.

Application Scenarios

RJ-2 controller CPU failure: A FANUC industrial robot's RJ-2 controller fails to initialise after power-on. No response from the teach pendant, no servo ready state. The A16B-3200-0040 main CPU board is identified as the fault. Replacement restores full robot operation.

Robot controller refurbishment: An older FANUC RJ-2 robot controller is refurbished for continued production service. The A16B-3200-0040 is replaced as part of a systematic electronic renewal to reset the controller's service life.

FAQ

Q1: What robot models use the RJ-2 controller with A16B-3200-0040?

The RJ-2 controller was used with multiple FANUC robot body series from the RJ-2 era — including Arc Mate, S-series, M-series, and other standard and specialty robot configurations. The specific robot models paired with the RJ-2 controller span payload ranges from compact welding robots to heavy-duty material handling robots. Confirm the controller type from the robot system's nameplate or documentation.

Q2: What happens to robot programmes when A16B-3200-0040 is replaced?

Robot programmes reside in SRAM memory modules — separate from the main CPU board. If the SRAM modules are intact and transferred with the board change, programme data is preserved. If the system requires SRAM module replacement simultaneously, a full programme restore from backup is needed. Always back up all robot programmes and system data before any main board maintenance.

Q3: Is the /04C revision critical, or can earlier revisions substitute?

The /04C is a hardware update revision to the A16B-3200-0040 base design. Later revisions are typically backward compatible in the same slot. Confirm from the RJ-2 controller maintenance documentation whether any minimum revision is specified. If no restriction is documented, the /04C is the current recommended version.

Q4: What is the discharge procedure before accessing the A16B-3200-0040?

The RJ-2 controller contains capacitors in its power supply that retain charge after the main power is removed. Follow FANUC's prescribed power-off and discharge procedure for the RJ-2 controller before opening the cabinet or accessing any internal boards. Confirm all LED indicators are extinguished before handling boards.