A06B-6127-H102 FANUC AC Servo Amplifier Unit A06B6127H102 A06B-6127-H102

FANUC A06B-6127-H102 | Alpha i HV AiSV-10HV Single-Axis Servo Module — 10A / 400–480V / FSSB / HRV2+HRV3

Single Axis, Exactly the Capacity Needed

The A06B-6127-H102 is the entry-level module in FANUC's Alpha i HV single-axis servo lineup — the AiSV-10HV on a 400V platform. The reason it exists alongside the dual-axis H202 (which also runs 10A per channel) is straightforward: not every axis pair that ends up in a CNC cabinet starts life at the same time in the same cabinet section.

When a machine places one 400V axis in a remote cabinet section — a B-axis rotary head, a tailstock drive, a fourth axis on an isolated subplate — a dual-axis module wastes half its hardware and cost. The H102 matches the actual need: one FSSB-addressed servo channel, 10A rated, on the 400V platform. When the machine later adds another axis at that position, the H102 remains unchanged; the new axis gets its own module.

Like every module in the 6127 series, the H102 connects to the shared DC bus supplied by the aiPS-HV power supply module and communicates with the CNC over FSSB fibre-optic cable. The module's FSSB address is assigned in the CNC's axis parameters. HRV2 and HRV3 high-response vector control are supported — the same control algorithms available on larger-current modules in the same family.

H102 in the 6127 Single-Axis Range

All single-axis H1xx variants are on the same 400V platform and share the same cabinet bus. Replacement must match the original H102 — fitting a higher-rated module wastes cost; no lower-rated option exists in this family

Key Specifications

H102 vs H202 — Not a Simple Swap

The H202 is the dual-axis 10A/10A module. The per-channel rating is identical, but the hardware differs: the H202 has two FSSB axis assignments, two sets of motor power connections, and a wider physical form. Replacing an H102 with an H202 requires rewiring the motor connections and reassigning FSSB axis mapping in the CNC parameters. This is never a simple swap. Replace like-for-like on the exact part number.

Maintenance Notes

Two practical maintenance points for this module:

Cooling fan: Fan bearing wear is a known wear-out mechanism across the 6127 series. Audible changes in fan noise — grinding, intermittent spinning, reduced speed — are early warning. A failed fan leads to thermal shutdown. Auxiliary axis modules like the H102 sometimes accumulate run-hours without the same maintenance attention given to primary axis drives.

FSSB fibre cable: Auxiliary axis FSSB cables are often routed across longer paths with more bending points. Contamination of the optical connector end faces or physical cable damage are more common causes of FSSB communication alarms on auxiliary axes than on main axes with shorter cable runs.

FAQ

Q1: H102 and H202 both run 10A at 400V — what is the actual difference?

H102 is single-axis (one drive channel, one motor). H202 is dual-axis (two channels at 10A each, two motors). The hardware is different, the FSSB axis assignments differ, and the motor wiring is different. Replacing an H102 with an H202 requires rewiring and FSSB parameter changes — never a simple drop-in. Replace like-for-like.

Q2: Can H102 and H202 modules share the same aiPS-HV power supply module?

Yes. The aiPS-HV feeds the entire cabinet's servo DC bus regardless of whether individual modules are single-axis H1xx or dual-axis H2xx. The power supply was sized at machine build time for the total axis power demand. H102 and H202 modules coexist on the same bus without issue.

Q3: Can the H102 be replaced by the second-generation A06B-6290-H102?

In principle, the 6290-H102 is the designated successor for the same 400V, 10A, single-axis application. However, compatibility depends on the CNC's software level — the 6290 series was designed for later CNC generations (0i-MD, 31i-B and later). Machines running 30i or 31i Model A may accept 6290 drives with parameter adjustments, or may not. The safest replacement for a 6127-H102 machine is an identical A06B-6127-H102 until a formal upgrade pathway is confirmed.

Q4: What servo motors is the H102 intended to drive?

Small Alpha i HV servo motors at or below 10A rated current — precision positioning axes, rotary tables, and auxiliary-function axes on large 400V CNC systems. The specific motor type is defined in the CNC's axis parameter (servo motor type parameter No. 2020). Confirm the installed parameters identify the motor type the H102 was originally configured to drive.

Q5: What signs indicate this module may be approaching failure?

Cooling fan: audible changes in noise (grinding, intermittent, reduced speed) indicate bearing wear. Front panel LED: persistent alarm indication warrants investigation even if the axis still operates. Visible discoloration or burn marks around connectors or heatsink indicate prior thermal stress. FSSB fibre connectors: inspect for dust or contamination, which degrades optical signal quality before causing outright communication faults.