Fanuc Motherboard for 21i A20B-8100-0665

A20B-8100-0665 is a printed circuit board (PCB) used in CNC control systems manufactured by FANUC.

---

📌 Basic Information

• Part Number: A20B-8100-0665

• Type: Printed Circuit Board (PCB)

• Category: Internal Control / Interface Board

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

---

⚙️ Main Functions

The A20B-8100-0665 board is used for internal communication and signal processing within the CNC control system.

Typical functions include:

• Communication between CNC control boards

• Signal processing for machine operations

• Interface management between different system modules

• Supporting overall CNC controller functionality

---

🧩 Installation Location

This board is normally installed:

• Inside the CNC control cabinet

• On the main control rack / motherboard

• Connected to other FANUC boards via the system backplane

---

🔎 Related Boards

The A20B-8100-066x PCB series includes several similar models:

• A20B-8100-0660

• A20B-8100-0661

• A20B-8100-0662

• A20B-8100-0663

• A20B-8100-0664

• A20B-8100-0665

These are typically hardware revisions or configuration variants of the same board family used in different machine setups.

---

✅ Simple explanation:
A20B-8100-0665 = FANUC internal CNC control PCB used for communication and signal processing inside the CNC controller. 🔧