FANUC Corporation A20B--0516 05B Servo Control Board

The FANUC Corporation A20B-0516-05B Servo Control Board is a dedicated control module used to drive servo motors within FANUC CNC and automation systems, providing the essential interface between the machine's motion commands and the physical motion of the axes. In operation, it interprets motion commands from the host controller, translates them into precise servo drive signals, and relies on encoder feedback to regulate position, velocity, and torque across one or more axes with real-time closed-loop control. As part of the A20B servo control family, this board is designed to connect with compatible FANUC servo amplifiers and controllers to enable coordinated multi-axis motion in applications such as milling centers, turning centers, robotics, and automated assembly lines. The A20B-0516-05B designation identifies the specific board within FANUC's A20B family, helping technicians confirm compatibility with particular backplanes, interfaces, and controller configurations and ensuring correct installation within a FANUC system. When sourcing a replacement or spare part, refer to official FANUC documentation to verify installation requirements, electrical interfaces, pinouts, and any model-specific considerations for your machine.