Fanuc Alpha Series Servo Amplifier Modules

Overview

Fanuc Alpha Series SVM (Servo Amplifier Module). It uses 3x PWM signals (one for each phase), 2x current feedback signals (3rd one calculated), and passes through the serial encoder pins to the controller. It does not close the velocity/position loop, nor is it responsible for correct commutation. It is a "dumb" amplifier, relying on the controller to monitor the absolute encoder and current feedback and generate the appropriate phase/amplitude sine waves.

Model Numbers

In the of the "65162E/03" manual:

Page 94 (74 in the PDF) details the model names and their applicable motors for the 200V models.

Page 99 (79 in the PDF) details the model names and their applicable motors for the 400V models.

Wiring Diagram

In the "65162E/03" manual:

Page 244 (224 in the PDF) is the beginning of the connector pinouts and wiring diagrams.

Page 261-268 (241-248 in the PDF) are the "ENC" serial encoder pinouts for different models.

Page 269-271 (249-251 in the PDF) are the "PWM" controller connector pinouts for different models.

Online Resources

Alpha Series AC Servo Amplifier Descriptions Manual GFZ-65162E/03 (September 1998)

Alpha Series AC Servo Motor Maintenance Manual GFZ-65165E/02 (June 2000)