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. -Output pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 16, 17. Or 1, 14, 16, 17. -Input pins 10, 11, 12, 13, 15. Or 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15. -Input and output pins with close by ground or +5vdc connections -Input pins 10, 11, 12, 13, 15. -Input and output pins with close by ground or +5vdc connections -Works directly with popular CNC hardware and software. -All TTL 5VDC signals. -Screw-On connections for all terminals. -Status LEDs for enable.