Functions and Features：

1. Completely support MACH3 and the other softs that use LPT port.
2. USB Power supply and external power supply separate，for protecting your PC.
3. Wide range external power supply voltage，12 - 24V，and has preventing reverse connection function。
4. All the input signals are separated by photocouplers，can be connected to Estop、Probe and Limit switches. To make your computer safe.
5. One relay output can be connected to spindle switch。 Using P17.
6. 0-10V photocoupler separated analog voltage output, can be connected to Frequency converter，using to control the spindle speed。 Using P1.
7. All 17 LPT ports are available，can be connected to stepping motor drivers, can control five stepping motor.
8. P1 can be used to output PWM signal，and can control the spindle Speed Regulator that has a photocoupler for input.
9. Can be connected to stepping motor drivers using common anode or common cathode input connection.
10. All of the LPT port names are printed on board, Easy to be used.