The card can collect four axes' encoder pulse signals simultaneously, and control servo motor by four output analog voltage. Furthermore, it can control input and output I/O signals.

Now commonly used servo motor is ac servo motor, the axial end in motor with photoelectric encoder, by examining the rotor Angle to frequency conversion control.

Due to the large torque coefficient, small torque ripple and ease of control, permanent magnet synchronous motor (PMSM) system has been widely used in many accurate servo control systems.