This card provides an easy way of interfacing your inputs and outputs from you parallel port. It provides terminals for the connections and conditions the signals for use in CNC applications -This board serves as a basic breakout board for the Smooth Stepper Board. -Input and output pins with close by ground connections. Forget about grounding problems. Easily connect your pin by using your close by ground connection. No need to be an electronics expert to ground all your stuff. Screw-On connections for all terminals. You only have to screw-on the wires to make all your connections