Description
🔧 FANUC A20B-2101-0041 – Servo Control / Drive PCB
A20B-2101-0041 is a FANUC internal printed circuit board (PCB) used in CNC systems, specifically as a servo drive control board within FANUC Alpha i / Series 20 servo amplifier systems.
🧠 What It Is
👉 A20B-2101-0041 = Servo Control / Drive PCB (Dual-Axis capable)
- Type: Internal servo control PCB
- Series: FANUC Series 20 / Alpha i systems
- Function Class: Servo drive control / add-on board
- Axes: Supports single or dual axis (dual channel)
It is not a standalone servo amplifier — it works inside a servo drive module.
⚙️ What It Does
This board acts as a control and interface layer inside the servo amplifier, handling:
- 🧠 Motion control processing (speed, position, torque commands)
- 🔄 Coordination of 1 or 2 servo axes
- 📡 Communication with CNC controller
- ⚙️ Interface between:
- CNC CPU
- Power stage (IGBT/inverter section)
- Encoder feedback system
👉 Simple explanation:
It is the “control brain board” inside a FANUC servo amplifier.
🔍 Key Technical Details
- Input Voltage: ~200 / 400 V AC systems
- Current Range: Approx. 4A to 160A systems
- Channels: Dual channel (supports 2 axes)
- Category: Servo drive control PCB / add-on board
- Operating Temp: ~0–40°C typical
🏭 Where It Is Used
- Inside FANUC Alpha i servo amplifiers (SVM / aiSV modules)
- Used in:
- CNC machining centers
- CNC lathes
- Multi-axis automation systems
- Works together with:
- Power modules (A06B-6114 / 6117 series)
- Servo motors (αi series)
🧠 Simple Explanation
👉 A20B-2101-0041 is an internal FANUC servo control PCB that processes motion commands and manages one or two servo axes inside a servo amplifier.