Fanuc ai Servo Amplifier Control Card 200VAC-input A20B-2101-0351

A20B-2101-0351 is a Fanuc Corporation printed circuit board (PCB) used inside Fanuc CNC control systems.

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🔧 A20B-2101-0351 – Description

• Type: PCB (electronic control board)
• Category: Control / interface board
• System: Fanuc CNC controller hardware
• Role: Internal board for signal processing and system communication

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⚙️ What it does

Depending on configuration, this board typically:

• Handles I/O signals between machine and controller
• Interfaces with other boards (CPU, servo system, operator panel)
• Processes control signals for machine operation
• Helps manage communication within the CNC system

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🧩 Model breakdown

• A20B → Fanuc PCB/board family
• 2101 → Board series/type
• 0351 → Specific version/revision of the board

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🔁 0351 vs 0355 (related variants)

• Both belong to the same 2101 board series
• Differences are usually:
  • Minor hardware revisions
  • Firmware compatibility
  • Slight functional/configuration changes

👉 They are not always directly interchangeable without verification.

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🏭 Typical use

• Fanuc CNC controllers (0 series, 16/18/21, etc.)
• Control cabinets of CNC machines
• Industrial automation systems