A06B-6200-H055 Fanuc Power Supply Module A06B6200H055 FANUC AO6B-62OO-HO55

FANUC A06B-6200-H055 | Alpha i aiPS-55 Power Supply Module — 200–240V AC Input / 283–339V DC Output / Regenerative

The DC Bus Foundation for Multi-Axis Alpha i Drive Cabinets

The A06B-6200-H055 is the aiPS-55 — a large-capacity Alpha i Power Supply Module that converts incoming three-phase AC into the regulated DC bus that feeds all connected Alpha i servo amplifier modules (αiSVM) and spindle amplifier modules (αiSPM) simultaneously. It is the shared power source for the entire drive cabinet, not a single-axis drive.

At 283–339V DC bus output from a 200–240V AC input, the aiPS-55 delivers the regulated bus voltage within the precise range that Alpha i drive modules require for correct operation. The 283V lower boundary maintains sufficient DC bus headroom for full motor control at minimum mains voltage (-10%); the 339V upper boundary reflects the regulated output at nominal input.

The A06B-6200 series is the Alpha i generation counterpart to the earlier A06B-6087/6088 PSM family. Where the A06B-6087-H137 PSM-37 provides 43 kW at 283–325V from a 200–230V AC input, the aiPS-55 in the A06B-6200 series provides higher capacity with the wider 200–240V AC input range of the Alpha i generation.

Key Specifications

Regenerative Control — Energy Back to the AC Supply

The aiPS-55 uses active regenerative control. During motor deceleration, kinetic energy flows back from the motors through the SVM modules to the DC bus. The aiPS-55's regenerative stage returns this energy to the AC mains supply rather than dissipating it in braking resistors. For machining centres with high-inertia axis moves and frequent direction reversals, the energy recovery reduces both running costs and cabinet thermal load.

PSM Selection Note

The A06B-6200 family covers multiple aiPS output ratings. Selecting the correct module for a specific drive configuration requires calculating the combined continuous demand of all connected αiSVM and αiSPM modules — not just their peak ratings. An undersized aiPS trips under sustained production loads; oversizing wastes cost without functional benefit.

FAQ

Q1: What is the role of the A06B-6200-H055 in the drive cabinet?

The aiPS-55 is the shared DC bus power source for all Alpha i drive modules in the cabinet. It converts the incoming three-phase AC to a regulated DC bus that every connected αiSVM servo module and αiSPM spindle module draws from. It is not a single-axis drive — it is the power foundation the entire drive cabinet depends on.

Q2: What is the difference between A06B-6200-H055 and the older A06B-6087/6088 PSM family?

The A06B-6200 family is the Alpha i generation, designed for the later i-Series CNC generation and accepting a wider input voltage range (200–240V AC) with a correspondingly wider DC bus output range (283–339V). The A06B-6087/6088 series is the earlier Alpha generation with a narrower 200–230V AC input range and 283–325V DC output. They serve the same shared-bus architecture role but are matched to their respective CNC and drive generations.

Q3: The aiPS-55 shows a bus overvoltage alarm with no heavy regenerative braking occurring. What does this indicate?

Bus overvoltage under normal load without heavy deceleration points to a fault in the active rectifier or regenerative control stage inside the PSM — an IGBT or control circuit no longer regulating the bus correctly. Do not reset and continue operation — an uncontrolled bus voltage rise can damage connected SVM and SPM modules. The PSM requires service or replacement.

Q4: Does replacing the A06B-6200-H055 require any CNC parameter changes?

No. The PSM stores no CNC parameters. After physical replacement, restore power and verify correct DC bus voltage at the connected drive modules before enabling axes. Check all power connections and confirm the fibre or digital communication link from the CNC to the drive chain is intact before running production.

Q5: How is the correct aiPS capacity selected for a specific machine?

Sum the continuous current demand of all connected αiSVM and αiSPM modules under the machine's typical duty cycle. This total determines the minimum PSM rating required. The aiPS-55 provides headroom for combined peak demand during simultaneous axis acceleration, but the continuous rating determines whether the PSM will sustain production loads without tripping. An oversized PSM is safe but unnecessary; an undersized PSM faults under sustained load.