1、MULTIPLE FUNCTIONS: The functions of this motion control card include support for automatic probe, emergency input, limit switch, support for connecting electronic handwheels 2、FOUR AXES LINKAGE: The USB interface board can connect four stepper motor drives or servo drives. 4 way universal input, can be connected to limit switch, emergency stop switch, probe switch, 0 return and other devices 3、100KHZ PULSE FREQUENCY: The maximum step pulse frequency of the motion control card is 100KHz, very suitable for CNC engraving, servo motor, stepper motor servo motor 4、STABLE AND CONTROLLABLE: The motion controller needs to use an external 24V DC power supply to isolate the USB and external ports, making the system more stable. And there is a 0‑10V output port, you can use software to control the speed of the spindle motor 5、UNIVERSAL INTERFACE: 4 universal isolated relay drive output interfaces can drive 4 relays to control spindle start, CW and CCW, pumps and other equipment 1 x USB CNC Controller Card1 x USB Cable1 x Driver Installation CD Item Type: Motion Controller CardMaximum Step Pulse Frequency: 100KhzMotherboard Dimension: Approx. 8 x 7.7cm / 3.15 x 3.03in