FANUC A06B-6127-H102 Alpha i Servo Amplifier Module — AiSV-10HV Single-Axis, Entry-Level HV Drive for 400V CNC Systems

There's a question that comes up often with the FANUC A06B-6127-H102: if the dual-axis H202 also runs at 10A per channel, why would a machine use a single-axis module instead? The answer lies not in the current rating, but in the machine's physical layout.

When a CNC system places one 400V axis in a remote cabinet section — a B-axis rotary head, a separate tailstock drive, or a fourth axis on an isolated subplate — installing a full dual-axis module just to use one channel wastes both money and cabinet space. The A06B-6127-H102 solves exactly that problem. It delivers the same 10A rated drive capacity as a single channel of the H202, but in a single-axis configuration that matches the actual need without leaving half the hardware idle.

This is the entry-level module in FANUC's Alpha i HV single-axis lineup — the smallest current rating in the H1xx range, on a 400V platform built for 30i, 31i, 32i, and 35i CNC systems. We stock it in new and used (inspected) condition, ready to dispatch worldwide within 0–3 working days.

Where the H102 Lives in a 400V Machine Configuration

FANUC's Alpha i HV servo architecture organizes the drive cabinet around a shared power supply (the aiPS-HV module), which feeds multiple servo amplifier modules and typically one spindle amplifier. Each servo module on the FSSB fiber optic bus is individually addressed by the CNC, regardless of whether it's a single-axis (H1xx) or dual-axis (H2xx) module.

The H102 is the go-to choice when the machine builder needs:

• A dedicated single-axis HV drive for a low-current precision axis without pairing it with another
• An additional axis where the remaining channel of an existing dual-axis module is already allocated
• A physically smaller footprint in a tight cabinet section where a dual-axis module's width is a constraint
• A replacement for an existing H102 where the machine was originally wired for single-axis operation

In all these situations, the H102 provides the same FSSB connectivity, HRV control performance, and 400V input compatibility as every other module in the 6127 family — just sized appropriately for a single low-current axis.

Technical Specifications

The 6127 HV Range in Full: Understanding Where H102 Fits

The 6127 series spans a wide current range, covering everything from small precision axes to large high-torque machine drives — all on the same 400V HV platform. The single-axis (H1xx) variants run from the H102 at 10A up through H103 (20A), H104 (40A), H105 (80A), and H106 at 58A continuous / 180A peak. Each is a dedicated single-channel module, giving its full rated capacity to one axis.

The H102 sits at the base of that range. Ten amps continuous is not a constraint for the class of motors it's intended to drive — the smaller alpha i HV servo motors used on precision positioning axes, rotary tables, or auxiliary-function axes of large CNC systems. For these applications, 10A is not "not enough power"; it's exactly the right sizing.

What matters for replacement procurement is matching the original current rating precisely. Fitting a higher-rated module (say, H103 or H104) in place of an H102 will not harm the motor, but it represents unnecessary cost. Fitting a lower-rated module is not an option — there is no HV single-axis module below 10A in the 6127 family. So if your machine's original specification is an H102, the H102 is your replacement.

Maintenance Perspective: Small Drive, Real Failure Modes

Because the H102 drives a smaller-current axis, it's sometimes overlooked in preventive maintenance schedules relative to the larger drives on the primary axes. In practice, the failure modes are consistent across the 6127 series regardless of current rating.

The internal cooling fan is a wear item. FANUC's own guidance treats fans as periodic replacement components — the bearing life of a cooling fan in a hot cabinet environment is finite, and a failed fan leads to thermal shutdown or, if the thermal fault is not detected early, to IGBT damage. On a drive that's sitting in a secondary or auxiliary axis role, the fan may accumulate run-hours without the same scrutiny applied to the main axis drives.

The fiber optic cable connecting the H102 to the CNC is another practical consideration. Because these cables can be routed across larger machine frames with multiple bending points, physical damage or connector contamination are more common causes of FSSB communication alarms on auxiliary axes than on main axes where the cabling is shorter and better protected.

Ordering, Payment & Shipping

Worldwide dispatch via DHL and FedEx. Most orders leave our facility within 0 to 3 working days following payment confirmation. Combined shipping is available for multi-item orders.

Payment options:

• Bank Transfer (T/T) — accepted for all order values
• PayPal — for orders up to $500
• Western Union — accepted for all order values

Import duties and local taxes at the destination country are the buyer's responsibility. Contact us before ordering if you need a shipping cost estimate for your specific location.

Warranty & Returns

Returns accepted when a unit arrives damaged, incomplete, or not as described — or proves non-functional within 4 days of receipt. Items must be returned in their original condition with the warranty label intact. Return freight is the buyer's responsibility.

Failures caused by incorrect installation, parameter mismatch, improper power supply connection, or physical damage after delivery are outside warranty coverage. When in doubt about compatibility with your system, contact us before purchasing.

Frequently Asked Questions

Q1: The A06B-6127-H102 and A06B-6127-H202 both involve 10A at 400V — what exactly is the difference, and does it matter for my machine?

 The H102 is a single-axis module (one drive channel, for one motor). The H202 is a dual-axis module (two drive channels at 10A each, for two motors). The per-channel current rating is identical, but the hardware and wiring are different. If your machine currently has an H102 installed, it was deliberately configured for single-axis operation at that location — the CNC's FSSB axis assignment is set for one axis from that module. Replacing an H102 with an H202 would require rewiring the motor connections, reassigning the FSSB axis mapping, and potentially adjusting cabinet mounting. This is more than a simple swap and is rarely worth doing unless the machine is being structurally reconfigured. Always replace like-for-like on the full part number.

Q2: My machine uses both H102 and H202 modules in the same cabinet — can they share a single HV power supply module?

Yes. The aiPS-HV power supply module in a 6127-series system feeds all the servo amplifier modules on that cabinet's DC bus, regardless of whether they are single-axis H1xx or dual-axis H2xx units. The power supply is sized based on the total servo axis power demand across all modules, not the number of modules. As long as the aiPS-HV installed in your machine was correctly sized for the full machine servo configuration at the time of build, the H102 and H202 modules coexist on the same power bus without issue.

Q3: Can the A06B-6127-H102 be replaced by the equivalent second-generation module (A06B-6290-H102)? In principle, the 6290-H102 is the designated successor for the same 400V single-axis 10A application. However, a direct swap requires careful verification. The 6290 series was designed for use with newer FANUC CNC control generations (0i-MD, 0i-TD, 31i-B, and later). If your machine runs a 30i or 31i Model A — the original target for the 6127 series — compatibility with the 6290-series module depends on the specific software level of your CNC. Some 30i/31i-A installations can accept 6290-series drives with parameter adjustments; others cannot. For machines where the original build specifically called for an A06B-6127-H102, the safest replacement is an identical 6127-H102 until a formal upgrade pathway has been confirmed.

Q4: What servo motors is the A06B-6127-H102 designed to drive?

The AiSV-10HV is suited to the smaller models in FANUC's Alpha i HV servo motor range — the low-inertia, high-speed motors typically used on precision auxiliary axes in 400V CNC systems. The specific motor compatibility depends on the motor's rated current and whether it falls within the amplifier's 10A continuous output capacity. Motors in the ai2/5000HV and similar small HV alpha motor ratings are typical pairings. The specific motor-to-drive matching for your machine will have been defined by the machine builder's servo parameter settings, which specify the motor model number (parameter No. 2020 in the CNC) and corresponding current limits. If you have access to the original machine parameters, these will confirm the motor type the H102 was configured to drive.

Q5: Are there visible signs on the A06B-6127-H102 that indicate wear or impending failure before it stops working entirely?

Yes, there are a few worth checking during scheduled maintenance visits. The most accessible is the cooling fan: any change in audible fan noise — grinding, intermittent spinning, or a noticeably slower rotation speed — is an early warning of bearing wear. The status LED on the front of the module should show normal operating state; any persistent alarm LED state warrants investigation even if the axis is still functional, as some fault conditions allow continued operation until the next power cycle. On used units, visible discoloration or burn marks around the connector area or on the heat sink surface indicate prior thermal stress. Finally, check the fiber optic cable connectors at both ends — the optical surfaces can become dusty or contaminated in dirty shop environments, degrading the FSSB signal quality before causing an outright communication fault.

Confirm availability or request a quote: Contact Ms. Amy — sales01@sande-elec.com | Skype: sandesales01 | Tel: +86 18620505228