A20B-8100-0250 is a printed circuit board (PCB) used in CNC control systems manufactured by FANUC.
📌 Basic Information
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Part Number: A20B-8100-0250
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Type: Printed Circuit Board (PCB)
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Category: Internal Control / Interface Board
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Used In: FANUC CNC controllers (commonly Series 0i / 16i / 18i / 21i, depending on machine configuration)
⚙️ Main Functions
The A20B-8100-0250 board is used for communication and signal processing inside the CNC control system.
Typical functions include:
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Data communication between CNC modules
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Processing machine control signals
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Interface management between different CNC boards
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Supporting the overall operation of the CNC controller
🧩 Installation Location
This PCB is normally installed:
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Inside the CNC control cabinet
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On the main control rack / motherboard
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Connected through the FANUC system backplane
🔎 Related Boards
The A20B-8100 PCB family includes multiple boards used in FANUC CNC systems, for example:
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A20B-8100-0150
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A20B-8100-0250
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A20B-8100-0261 ~ 0264
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A20B-8100-0271
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A20B-8100-0660 ~ 0665
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A20B-8100-0830
These boards typically differ in hardware revision, firmware compatibility, or machine-specific configuration.
✅ Simple explanation:
A20B-8100-0250 = FANUC internal CNC control PCB used for signal processing and communication inside the CNC controller. 🔧


