Description
FANUC A06B-6110-H055 – Power Supply Module (PSM-55i) – Description
The FANUC A06B-6110-H055 is a high-capacity ALPHA i Power Supply Module (PSM-55i) used in FANUC CNC and servo/spindle drive systems. It is designed to convert incoming AC power into a stable DC bus supply, which is distributed to servo amplifiers and spindle drive modules in CNC machines.
This module belongs to the FANUC ALPHA i power supply series (A06B-6110 family) and is widely used in medium to large CNC machining centers, including milling, turning, and multi-axis production machines. It operates on 200–240V AC three-phase input and delivers a regulated DC output for stable and continuous machine operation.
The H055 variant is a high-power unit (approx. 55–65 kW class), capable of supporting multiple servo axes and spindle amplifiers simultaneously. It is commonly used in advanced CNC systems where high current capacity, stable power distribution, and reliability are critical for uninterrupted production.
It provides a DC output range of approximately 283–339V DC with integrated protection features such as overvoltage, overcurrent, and thermal protection. The module also includes internal control and diagnostic functions for system monitoring and fault detection, ensuring safe and reliable CNC operation.
Key Features
- Original FANUC ALPHA i Power Supply Module (PSM-55i)
- 200–240V AC three-phase industrial input
- Converts AC to stable DC bus voltage (≈283–339V DC)
- High power capacity (~55–65 kW class)
- Supports multiple servo and spindle amplifiers
- Built-in protection: overvoltage, overcurrent, thermal
- Integrated diagnostics for CNC system reliability
Applications
- CNC machining centers
- Milling and turning machines
- Multi-axis industrial automation systems
- FANUC CNC systems (0i / 16i / 18i / 21i series and similar platforms)
- Servo and spindle drive power distribution systems
Benefits
- Stable and reliable DC power for all drive modules
- Improves CNC machine uptime and production stability
- Protects servo and spindle amplifiers from electrical faults
- High-efficiency power conversion for industrial use
- Suitable for continuous heavy-duty operation
Product Type
- CNC Power Supply Module (ALPHA i Series)

