The Fanuc A20B-3300-0638 is a compact Axis Card A2 servo control module designed for Fanuc 0i-Model D (0i-TD / 0i-MD) and compatible CNC systems. It supports up to 4 axes with HRV3 / HRV2 control, delivering high-precision digital servo positioning, velocity commands, and current loop regulation via FSSB (Fiber-optic Serial Servo Bus) interface. This plug-in PCB integrates advanced DSP/ASIC processing, robust connectors for servo amplifier and motor feedback, and operates on system-supplied power with low-power logic circuitry. [stock available]