Fanuc HSSB interface board for 16i/ 18i/ 21i A20B-8001-0641

A20B-8001-0641 is a printed circuit board (PCB) used in CNC control systems manufactured by FANUC.

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📌 Basic Information

• Part Number: A20B-8001-0641

• Type: Printed Circuit Board (PCB)

• Category: Control / Interface Board

• Used In: FANUC CNC controllers (commonly Series 0 / 0i / 16 / 18 / 21, depending on the machine configuration)

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⚙️ Main Functions

The A20B-8001-0641 board is used for signal processing and communication between different modules inside the CNC control system.

Typical functions include:

• Processing machine control signals

• Data communication between CNC system boards

• Interface management between system modules

• Supporting overall CNC controller operation

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🧩 Installation Location

This board is typically installed:

• Inside the CNC control cabinet

• On the main control rack / motherboard assembly

• Connected through the FANUC backplane system

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🔎 Board Series

The A20B-8001 PCB series includes several internal boards used in FANUC CNC systems. Differences between boards usually involve:

• Hardware revision

• Firmware compatibility

• Machine builder configuration

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✅ Simple explanation:
A20B-8001-0641 = FANUC internal CNC control PCB used for communication and signal processing inside the CNC controller. 🔧