Fanuc Servo Amplifier A06B-6079-H101 or A06B6079H101

FANUC A06B-6079-H101 | Alpha SVM1-12 Single-Axis Servo Module — 3.0A / 0.75 kW / Type A/B Interface

Part Number: A06B-6079-H101

Manufacturer: FANUC Corporation (Japan)

Product Type: Single-Axis Servo Amplifier Module — Alpha Series 

Type A/B Interface — The Critical Distinction

The A06B-6079-H101 and the A06B-6096-H101#H are both SVM1-12 modules — identical model designation, identical electrical ratings (3.0A, 0.75kW, 283–325V, 230V output), identical physical 60mm form factor. The difference is the CNC interface, and it is the difference that determines which one the machine needs.

The A06B-6079-H101 uses Type A/B interface — a parallel PWM cable connection from the CNC's servo drive unit to the amplifier module. This is the original Alpha series interface architecture used with FANUC Series 15, 16, 18, and 21 non-i controls. The A06B-6096-H101 (FSSB variant) uses a fibre-optic serial bus for i-Series controls. These interface types are not compatible — a machine wired for Type A/B cannot use the FSSB module, and vice versa.

On the A06B-6079-H101, the series identifier in the middle of the drawing number — 6079 — is the field identifier for the Type A/B interface generation. When examining a module in the cabinet, this number in the part label immediately confirms which interface generation is installed before any wiring is inspected.

Key Specifications

SVM1-12 — Entry-Level Module for Light Auxiliary Axes

At 3.0A continuous output and 0.75 kW, the SVM1-12 is sized for the light end of the Alpha axis range. Its paired motor classes are the α1/3000 (1 Nm, 3000 rpm) and α2/2000 (2 Nm, 2000 rpm) — small-frame Alpha motors used on auxiliary positioning axes: C-axis on small turning centres, rotary table drives, tool magazine indexing, and low-load secondary axes. The 0.75 kW DC bus draw is negligible in the PSM demand calculation for a multi-module cabinet.

An installation note specific to this module: when sourcing a replacement, specify whether the installation uses one or two CX5 battery ports. Some variants differ in this configuration.

A06B-6079 Series Context

The A06B-6079 family is the complete Alpha SVM series with Type A/B interface. Every model from SVM1-12 (H101) through SVM1-360 (H108) and the dual-axis SVM2 range has a parallel A06B-6096 FSSB counterpart. The 6079 and 6096 series share the same model names (SVM1-12, SVM1-40, etc.) and electrical ratings — only the middle digits of the part number identify the interface generation.

FAQ

Q1: Can the A06B-6079-H101 (Type A/B) replace the A06B-6096-H101 (FSSB)?

No. Both are SVM1-12 modules with identical electrical ratings but different CNC interfaces. The A06B-6079 uses Type A/B parallel PWM cable connections for Series 15/16/18/21 non-i controls. The A06B-6096 uses FSSB fibre-optic bus for i-Series controls. These interface architectures are not compatible — using the wrong variant requires rewiring the module's CNC connection, which is not a practical field replacement.

Q2: What Alpha servo motors are compatible with the A06B-6079-H101?

The α1/3000 (1 Nm, 3000 rpm) and α2/2000 (2 Nm, 2000 rpm). Both motor classes draw rated current comfortably within the 3.0A continuous rating. Motors in the α3 class and above require the SVM1-20 (H102, 5.9A) or larger.

Q3: What alarms indicate the A06B-6079-H101 has failed rather than the motor?

Alarm 8 (overcurrent / IPM fault): disconnect the motor power cables and measure winding-to-earth insulation resistance. If insulation is good (several hundred megaohms) and the alarm persists with cables disconnected, the amplifier module has an internal fault. If insulation is low, the motor or cable is the fault source. Persistent communication faults with the CNC servo drive unit after confirming cable integrity also indicate a module fault.

Q4: Does replacing the A06B-6079-H101 require CNC parameter changes?

For a like-for-like SVM1-12 Type A/B replacement, no axis parameter changes are needed — motor type parameters and servo gains are stored in the CNC's SRAM and are unaffected by the module swap. Verify the axis number assignment and connections match the original installation before powering up.

Q5: Where is the A06B-6079-H101 sourced?

Through the FANUC Alpha module aftermarket — the A06B-6079 series has a large installed base and remains actively available through specialist CNC drive dealers, exchange programs, and repair services. Confirm the H101 (SVM1-12 Type A/B) and specify the CX5 battery port configuration (one or two) if the supplier requests this information.