1. Full support for MACH3 and other computer software supporting parallel port control. 
 2. USB power supply and peripheral power supply are separated to ensure the safety of the computer. 
 3. All input signals are isolated by an optical diaphragm and can be connected to emergency stop, instrument setting, limit, etc. 
 5. The relay can control the spindle switch. Pin P17. 
 6. 0-10V output can work with inverter with corresponding analog interface for spindle speed control, P1. 
 7. Can control 5-axis machine. 
 8. P1 acts as a PWM output and can control the spindle governor.