1. Comaptible with for MACH3 software.Support for windows XP, WIN7, WIN8, WIN10, support tablet computers, as well as 64-bit systems. 2. Provide PWM output (5V level) isolated by optocoupler to control other PWM controlled spindle speed controllers. Provide 4 output ports (5V level), which can be connected to a relay module with optocoupler to control water cooling, spray, etc. 3. External wide voltage input, 12-24V, and anti-reverse connection function. 4. All input signals are isolated by optical coupling, which can be connected to emergency stop, tool setting, limit, return to zero, etc., to computer safety. 5. It provides 0-10V analog voltage output isolated by optocoupler, and can control the frequency converter input by 0-10V analog voltage to control the spindle speed. It can be connected to a stepping motor driver with a common anode or common cathode input, a level of 5V, and an optocoupler input. At the same time, a 5-axis interface cable socket (HX2.54) is provided, which is convenient for connecting the stepper motor driver. Set inverter: 1. Set the inverter to external terminal start. 2. Set the frequency control mode of the inverter to analog (0-10V) input control. Quickly set up the inverter: 1. The inverter does not need to be connected to the interface board first. 2. Short-circuit the FWD and COM of the inverter, and short-circuit the 10V and VI of the inverter. Connect the spindle. (Of course, it is better to connect the potentiometer to the 10V, VI and GND of the inverter according to the figure). 3. Power on, if the inverter can run at the maximum speed and the spindle rotates normally, it basically means that the setting is correct. (If a potentiometer is used, the speed is adjustable). Caution! Please mind the power polarity and drivers direction. Please don't put the drivers or motors on/offwhen power on. Please disconnect all motors when adjust driver current. Material: plastic colour: As Shown Package Contents: 1 x V3.25 5-axis control card 1 x USB cable 1 x CD 1 x Tool setter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.