1. General Information

• Part Number: A06B-6102‑H122 / H222 / H226 (#H520)

• Model: αi SPM‑22 / SPM‑26 (Spindle Amplifier Module)

• Brand: FANUC

• Application: High‑speed/high‑power spindle drive for CNC lathes, machining centers, high‑precision milling

• Communication: FANUC Serial Spindle Bus (fiber‑optic or cable)

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

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

2. Electrical Ratings (Common)

• DC Bus Input Voltage: 283–325 VDC (from αi PSM power supply)

• Output Voltage: 3‑phase 230 VAC

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

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

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

• Protection Class: IP20 (indoor use)

3. Model Variations (A06B-6102‑xxx)

A06B-6102‑H122 (#H520) – SPM‑22 Type 4

• Rated Power: 22 kW

• Rated Output Current: 85 A

• Features: Cs contour control, high‑resolution internal circuit

A06B-6102‑H222 (#H520) – SPM‑22

• Rated Power: 25.2 kW

• Rated Output Current: 95 A

• Max Output Current: 120 A

A06B-6102‑H226 (#H520) – SPM‑26

• Rated Power: 29.8 kW

• Rated Output Current: 111 A

• Max Output Current: 140 A

4. Protection Functions

• Overvoltage / Undervoltage protection

• Overcurrent / Short‑circuit protection

• Overtemperature protection (main circuit / motor)

• Fan failure detection

• DC link fuse blown detection

• Motor overspeed / speed error alarm

5. Connector Description

• CXA2A: 24 VDC control power, alarm output

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

• CN1: Spindle encoder feedback

• CN2: Spindle motor power (U/V/W)

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

• PE: Protective earth (ground)

6. Compatibility

• CNC Systems: 0i‑MF/TF, 16i/18i/21i, 30i‑B (FSSB interface)

• Spindle Motors: αi series (αiS/αiF/αiM) 22–26 kW class

• Power Supply Unit: A06B‑6091/6134 series (αi PSM)

• Feedback: FANUC αi spindle encoder (A/B/Z/Cs signals)

7. Key Features

• High‑power spindle control (22–30 kW) for heavy machining

• Fiber‑optic FSSB for high noise immunity and simplified wiring

• High‑speed response, support for rigid tapping and Cs contouring

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

• Compact, high‑density design for cabinet space optimization

8. Typical Alarm Codes

• 1: Motor overheat

• 3: Excessive speed error

• 5: Power supply fuse blown

• 7: Overspeed

• 12: Overcurrent in power circuit

• 36: Overflow error counter