Fanuc Cover Case for 16i/ 18i/ 21i A02B-0236-D100#4C

A02B-0236-D100#4C is a CNC main control board / motherboard module used in CNC systems manufactured by FANUC.

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📌 Basic Information

• Part Number: A02B-0236-D100#4C

• Type: CNC Main Board / Control Module

• Controller Series: FANUC Series 16i / 18i / 21i

• Category: CNC controller internal hardware board

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⚙️ Main Functions

This board operates as a core processing module inside the CNC control unit and performs:

• Execution of NC programs (G-code / M-code)

• Axis interpolation and motion calculations

• Communication with servo amplifiers and spindle drives

• Running PMC (Programmable Machine Control) ladder logic

• Managing machine I/O signals

• Handling system alarms, diagnostics, and internal communication

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🧩 Meaning of “#4C”

In FANUC part numbers:

• #4C indicates a specific configuration or option version of the same hardware board.

• It may represent differences such as:

  • Installed memory size

  • Software compatibility

  • Machine-builder customization

  • Hardware revision

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🔌 Typical System Connections

The A02B-0236-D100 motherboard typically works with:

• Servo amplifier modules

• Spindle amplifier

• I/O interface boards

• Operator panel / LCD display

• System memory and software modules

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✅ Simple explanation:
A02B-0236-D100#4C = FANUC CNC motherboard used in 16i/18i/21i controls to process machining programs and control machine motion, servo drives, and I/O signals.