1. General Information

• Model: A06B-6114-H304 (SVM3‑20/20/40i, αiSV‑20/20/40)

• Type: Three‑axis integrated AC servo amplifier (Alpha i series)

• Manufacturer: FANUC

• Description: Compact, high‑performance 3‑axis drive for CNC machine tools, machining centers, lathes, and multi‑axis automation equipment.

• Applicable Motors: FANUC αi series servo motors

• Manual Reference: B‑63282EN (FANUC αi Servo Amplifier Series)

2. Electrical Specifications

• Input Voltage: 3‑phase AC 200–240 V ±10%, 50/60 Hz

• DC Link Voltage: 283–339 V

• Rated Input Power: 9.5 kW

• Output Voltage: 0–240 V AC, 3‑phase

• Continuous Output Current (RMS):

  • Axis L/M: 6.5 A each

  • Axis N: 13 A

• Peak Output Current: 2× continuous (max 0.5 s)

• Control Method: Full digital vector control (HRV3)

• Feedback Interface: Incremental encoder / serial absolute encoder

• Communication: FSSB (FANUC Serial Servo Bus), 12 Mbps

• Cooling: Forced air cooling (internal fan)

• Insulation Class: Class H (180 °C)

3. Environmental & Mechanical

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −20 °C to +70 °C

• Humidity: 5–95% RH, non‑condensing

• Protection Class: IP20 (front face)

• Mounting: Vertical installation in control cabinet

• Dimensions (W×H×D): 90 mm × 243 mm × 228 mm

• Weight: Approx. 3.7 kg (8.25 lbs)

4. Key Features

• 3‑axis integration: Saves cabinet space and reduces wiring

• High‑speed response: HRV3 control, 1 μs cycle time

• High positioning accuracy: Supports 1 μm level precision

• Dual encoder support: Incremental / absolute serial encoder

• Built‑in protection: Overcurrent, overvoltage, undervoltage, overtemperature, overload, encoder failure, fan fault

• LED status indicators: Power, alarm, FSSB communication

• Easy maintenance: Accessible fan replacement, modular design

5. Installation Instructions

1. Power off: Disconnect all power before installation or wiring.

2. Mounting: Install vertically on a rigid cabinet rail; maintain ≥50 mm clearance top and bottom for airflow.

3. Input wiring: Connect 3‑phase AC power (L1/L2/L3) and protective earth (PE).

4. Motor wiring: Connect motor power cables to U/V/W terminals for each axis.

5. Feedback wiring: Connect encoder cables to respective feedback connectors.

6. Communication wiring: Connect FSSB cable to CNC controller.

7. Terminal torque: Tighten all terminals to 1.2–1.5 N·m.

8. Fan check: Verify internal fan operates normally after power‑on.

6. Maintenance & Troubleshooting

Routine Maintenance

• Clean air filter every 1–3 months.

• Check fan operation monthly; replace if noisy or stopped.

• Inspect terminals and cables for tightness or damage every 6 months.

Common Alarms

• ALM 300 (Overcurrent): Motor short circuit, wiring fault, or axis overload.

• ALM 430 (Overtemperature): Poor ventilation, blocked fan, or ambient temp too high.

• ALM 510 (FSSB Error): Check FSSB cable, connector, or CNC communication setup.

• ALM 01 (Fan Stop): Internal cooling fan failure; replace fan.

7. Safety Precautions

• Installation and servicing must be performed by qualified electricians.

• High voltage remains for ≥10 minutes after power‑off; wait before touching terminals.

• Do not block ventilation openings—risk of overheating and fire.

• Use only FANUC‑specified cables and connectors to ensure safety and compatibility.

• Ground the amplifier housing properly to avoid electric shock.