Pins 1 (w/Orange) – Not Connected 2 (Orange) – Not Connected 3 (w/Green) – RX+ 4 (Blue) – GND (DC-) 5 (w/Blue) – GND (DC-) 6 (Green) – RX- 7 (w/Brown) – 5v or 12v + 8 (Brown) – 5v or 12v + This is the male end of the keypad pins for wiring to the COM1 on DS81 v1 …

Above is an image that shows the pinout for the DB9 connection of COM1 of the Shuttle-PC DS81 V1 of the Touch Score Scoring Replacement System. Also the Update with Touch Score Latest Version is Here