FANUC A06B-6110-H030 Alpha i Series Power Supply Module PSM-30i
The A06B-6110-H030 — designated the PSM-30i within FANUC's Alpha i series drive system — is a 30 kW power supply module for 200V-class installations. It converts three-phase AC mains into regulated DC bus voltage that feeds every αi servo amplifier and spindle amplifier in the chain, featuring built-in power regeneration capability.
Role in the αi Series Drive Architecture
FANUC's Alpha i series drive system uses a modular architecture where servo and spindle amplifier modules draw power from a shared high-voltage DC bus provided by a dedicated power supply module. The PSM-30i serves as the source of this DC bus for 200V-class systems, feeding the entire amplifier chain for CNC machines. A PSM failure stops all motion axes, making this module a critical maintenance component.
Technical Specifications
| Parameter | Value |
|---|
| Part Number | A06B-6110-H030 |
| Model Designation | PSM-30i / αiPS-30 |
| Series | FANUC Alpha i (αi) — 6110 Series |
| Module Type | AC/DC Power Supply Module with Regeneration |
| Input Voltage | 200-240 V AC, 3-phase, 50/60 Hz |
| Output Voltage (DC Bus) | 283-339 V DC |
| Rated Output Power | 30 kW |
| Regeneration Method | Power regeneration (returns energy to AC line) |
| Weight | Approx. 17.99 lbs (8.2 kg) |
| Generation | First generation 6110 series |
| Successor Part | A06B-6140-H030 |
| Manufacturer | FANUC Corporation, Japan |
Power Regeneration Benefits
Unlike older systems that used braking resistors to dissipate energy as heat, the PSM-30i employs power source regeneration technology to return motor deceleration energy to the AC power line. This approach significantly reduces power consumption, eliminates resistor banks as failure points, and removes heat load from the cabinet thermal budget.
Alarm Codes and Diagnostics
The A06B-6110-H030 features onboard self-diagnostics that report faults through LED alarm codes:
| Alarm | Condition |
|---|
| AL-1 | Overcurrent in main power module |
| AL-2 | Cooling fan stopped (internal) |
| AL-3 | Main circuit heat sink over-temperature |
| AL-4 | DC bus voltage drop |
| AL-5 | Main capacitor failed to charge within specified time |
| AL-6 | Input power supply abnormal |
| AL-7 | DC bus voltage abnormally high |
| AL-A | External cooling fan (heat sink fan) stopped |
| AL-E | Input power supply abnormal — open phase |
AL-4 and AL-5 are common field failures often related to capacitor degradation after years of service. AL-2 and AL-A indicate cooling fan failure, which is a routine maintenance item.
Compatible CNC Systems
The A06B-6110-H030 is designated for 200V-class αi series drive systems across FANUC's major CNC platforms:
- FANUC 0i Series (0i-B, 0i-C, 0i-D) — Widely deployed in vertical machining centers, turning centers, and wire-cut EDM machines
- FANUC 16i / 18i Series — Higher-function CNC for multi-axis machining centers and turn-mill centers
- FANUC 21i Series — Mid-range CNC common in Asian and European machine tools
- FANUC 30i / 31i / 32i Series — Most capable platform for high-speed machining and precision aerospace equipment
The 30 kW rating covers machine configurations where larger PSM-37i or PSM-55i variants are not required.
Generation Comparison
The A06B-6110-H030 belongs to the first generation 6110 series FANUC Alpha i power supply modules. Its direct successor is the A06B-6140-H030, which features updated PCB revisions and modified wiring boards while maintaining the same mechanical envelope and electrical interface. The 6140 series serves as a form-fit-function replacement for the 6110 in most installations.
Maintenance and Spare Parts Strategy
The PSM is among the highest-priority spare parts for facilities running FANUC αi series equipment because:
- A PSM failure simultaneously shuts down all machine motion with no degraded operation mode
- Machining centers and turning centers with failed PSMs cannot produce parts until replacement
- The 30 kW rating covers most standard 3-5 axis vertical machining centers and CNC turning centers
Having a verified spare module minimizes production downtime during critical failures.
Frequently Asked Questions
What is the difference between the A06B-6110-H030 and the A06B-6140-H030?
Both are FANUC PSM-30i power supply modules rated at 30 kW for 200V-class αi series systems. The A06B-6110-H030 is the first-generation (6110 series) version; the A06B-6140-H030 is the second-generation successor with updated PCB revisions. They share identical mechanical mounting, electrical connections, and functional specifications.
Which FANUC CNC controls and machine types use the A06B-6110-H030?
The PSM-30i is used in any FANUC 200V-class αi series drive system paired with FANUC 0i, 16i, 18i, 21i, 30i, 31i, or 32i CNC controls. Common applications include vertical and horizontal machining centers, CNC turning centers, and 5-axis machines where total servo and spindle motor power falls within the 30 kW capacity.
What does the PSM-30i actually do within the drive cabinet?
The PSM converts three-phase 200-240V AC mains into regulated DC bus voltage (283-339V DC) that supplies motor power to all servo amplifier modules and spindle amplifier modules in the αi series chain. It also provides 24V DC control power to amplifier modules. Without a functioning PSM, no motion axes can operate.
Why is AL-4 or AL-5 appearing on my PSM-30i, and what should I check first?
AL-4 (DC voltage drop) and AL-5 (main capacitor failed to charge) are frequently caused by capacitor degradation in the DC bus section of aging PSM units. First, check three-phase input voltage for correct voltage, balanced phases, and no open phase (AL-E). If input power is confirmed good, the module likely requires component-level repair or replacement.
Can the A06B-6110-H030 be repaired, and is a refurbished unit a viable alternative?
Yes, specialized FANUC drive repair shops rebuild PSM-30i units at the component level, replacing capacitors, fans, and other age-limited parts. Refurbished units tested on live FANUC systems provide cost-effective alternatives to new modules, particularly for older 6110-series parts no longer in production. Verify that refurbishers test on actual FANUC hardware rather than just bench power supplies.
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