The FANUC A06B-6117-H304 Alpha i SV 20/20/40 servo amplifier module is designed for high-performance three-axis motion control in FANUC CNC machine tool systems.

The amplifier integrates three servo channels in a compact module with an output configuration of 20/20/40, enabling coordinated control of multiple servo axes while reducing cabinet space and simplifying wiring.

Operating from a 283–339 VDC DC bus, the module communicates through the FANUC Serial Servo Bus (FSSB) and works with compatible Alpha i servo motors and serial encoder feedback systems to achieve accurate positioning, smooth speed regulation, and stable torque control.

Its integrated protection functions monitor overcurrent, overvoltage, and overheating conditions to improve system reliability during continuous CNC operation.

This product is a three-axis servo amplifier module only. It should not be described as a servo motor, CNC controller, spindle amplifier, power supply module, or variable frequency drive.

Key Features

Alpha i SV 20/20/40 servo amplifier

Three-axis servo control

20/20/40 output configuration

283–339 VDC DC bus input

FSSB high-speed communication

Compatible with FANUC Alpha i servo motors

Serial encoder feedback

Compact multi-axis design

Accurate positioning performance

Stable speed regulation

Integrated protection functions

Forced-air cooling

Cabinet-mounted installation

Suitable for CNC machine tools

Typical Applications

CNC machining centers

CNC milling machines

CNC lathes

Grinding machines

Industrial automation equipment

Precision manufacturing systems

Multi-axis CNC machines

Servo retrofit projects

Machine maintenance and replacement

Installation Notes

Before installation, confirm that the replacement model is A06B-6117-H304.

Verify the following before commissioning:

Servo motor models

Encoder feedback cables

DC bus voltage

FSSB communication wiring

Axis assignment

CNC parameters

Cooling fan operation

Grounding and shielding

After installation, perform servo initialization, alarm verification, axis movement testing, and encoder feedback checks before returning the machine to production.

FAQ

Q

What is A06B-6117-H304?

A

It is a FANUC Alpha i SV 20/20/40 three-axis servo amplifier module for CNC machine tools.

Q

How many servo axes does this module control?

A

It controls three servo axes.

Q

What communication interface does it use?

A

It uses the FANUC Serial Servo Bus (FSSB).

Q

What input voltage is required?

A

It operates from a 283–339 VDC DC bus.

Q

What are the output current ratings?

A

The amplifier provides 5.9 A for the L axis, 5.9 A for the M axis, and 11.8 A for the N axis.

Q

Is A06B-6117-H304 a servo motor?

A

No. It is a three-axis servo amplifier module used to drive compatible FANUC Alpha i servo motors.