1. General Information

• Part Number: A06B-6104-H275 (#H520)

• Model: αi SPM‑75HV (High‑Voltage Spindle Amplifier Module, 400 V class)

• Brand: FANUC

• Application: Ultra‑high‑power spindle drive for large CNC machine tools, heavy‑duty machining, high‑torque milling/turning; supports rigid tapping, Cs contouring

• Communication: FSSB (FANUC Serial Spindle Bus, fiber‑optic)

• Mounting: Vertical, cabinet‑mounted (heavy‑duty screw‑fixed)

• Weight: Approx. 20 kg (44 lbs)

• Manual Number: B‑65162 (instruction), B‑65285E (maintenance)

• Special Note: Type 1 spindle interface, no JY5 sensor connector; for large HV spindle motors

2. Electrical Ratings (400V High‑Voltage)

• DC Bus Input: 565–650 VDC (from αi PSM‑HV power supply)

• Rated Output Power: 75 kW

• Rated Output Current: 145 A (3‑phase)

• Max Output Current: 180 A

• Output Voltage: 3‑phase AC 400 V

• Input Frequency: 50/60 Hz

• Cooling: Built‑in forced air cooling (high‑flow internal fan)

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

• Storage Temperature: −20 °C to +60 °C

• Protection Class: IP20 (indoor use)

• Certification: CE approved

3. Compatibility

• CNC Systems: 30i‑B, 31i‑B, 32i‑B (FSSB interface, high‑end CNC)

• Spindle Motors: αi‑HV series (αiS‑HV/αiF‑HV) 75 kW class (400 V)

• Power Supply: A06B‑6134‑Hxxx (αi PSM‑HV 400V series)

• Feedback: αi spindle encoder (A/B/Z/Cs signals, high‑resolution)

4. Connector Description

• CXA2A: 24 VDC control power, alarm output

• FSSB IN/OUT: Fiber‑optic communication (CNC ↔ amplifier)

• CN1: Spindle encoder feedback (high‑voltage compatible)

• CN2: Spindle motor power (U/V/W, 400V high‑current)

• P/N: DC bus (+/−), regenerative resistor terminals (high‑power)

• PE: Protective earth (heavy‑gauge ground)

5. Protection Functions

• Overvoltage / Undervoltage protection (400V HV range)

• Overcurrent / Short‑circuit protection (180A max)

• Overtemperature protection (main circuit / motor / heat sink)

• Fan failure detection (dual‑fan monitoring)

• DC link fuse blown detection (HV fuse)

• Motor overspeed / speed error alarm

• Regenerative overvoltage protection

6. Key Features

• 75 kW high‑power output for extreme heavy‑duty machining

• 400V high‑voltage design reduces current and wiring size

• Fiber‑optic FSSB for maximum noise immunity in industrial environments

• High‑speed response; supports high‑precision rigid tapping and Cs contouring

• Built‑in self‑diagnostics with LED status and detailed alarm codes

• Heavy‑duty compact design for large machine tool cabinets

7. Typical Alarm Codes (HV Series)

• 1: Motor overheat (HV motor)

• 3: Excessive speed error

• 5: DC link HV fuse blown

• 7: Overspeed (HV spindle)

• 12: Overcurrent in power circuit (HV)

• 36: Overflow error counter

• 45: Regenerative resistor overload