| The left hand connector (as viewed from the back of the board) is the serial interface to the controlling PC. You need a standard serial cable, male DB9 on one end, and female DB9 or DB25 on the other end to match your computer. The controller is set to run at 9600 baud, so initialize your control program(s) for this rate. |
|---|
| 1 | DCD (connected to 4,6 & 8) |
| 2 | Txd (serial out) |
| 3 | Rxd (serial in) |
| 4 | DTR (connected to 1,6 & 8) |
| 5 | Ground |
| 6 | DSR (connected to 1,4 & 8) |
| 7 | NC |
| 8 | CTS (connected to 1,4 & 6) |
| 9 | NC |