A20B-8100-0660 is a PCB (Printed Circuit Board) used in CNC control systems manufactured by FANUC.
📌 Basic Information
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Part Number: A20B-8100-0660
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Type: Printed Circuit Board (PCB)
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Category: Control / Interface Board
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Used In: FANUC CNC control units (commonly Series 0i / 16i / 18i family depending on machine builder configuration)
⚙️ Main Functions
This board typically performs control or interface processing inside the CNC control cabinet. Its roles may include:
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Signal processing between CNC modules
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Communication interface with other boards or machine devices
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I/O signal management
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Supporting system control operations
🧩 Typical Installation Location
The A20B-8100-0660 PCB is usually installed:
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Inside the CNC control unit
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On the main control rack or motherboard assembly
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Connected to other FANUC boards via backplane connectors
🔧 Typical Applications
Used in machines such as:
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CNC machining centers
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CNC lathes
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CNC grinding machines
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Other industrial machines using FANUC CNC controllers
✅ Simple explanation:
A20B-8100-0660 = FANUC internal control PCB used inside the CNC control unit for signal processing and communication between CNC system modules. 🔧
If you want, I can also explain:
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Which FANUC CNC series uses this board most commonly
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Common faults of the A20B-8100 boards
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Compatible replacement boards.


