DigiCart/E RC-320
| 15 Pin D-Sub male | SIGNAL | 9 pin D Sub female |
| 1 | GND | 1 |
| 2 | +5 Volts (Not normally used) | 2 |
| 3 | GND | 3 |
| 4 | TX + (DigiCart Transmitter, wire to RX+) | 4 |
| 5 | TX – (DigiCart Transmitter, wire to RX-) | 5 |
| 6 | Remote Present Return (Not Used) | |
| 7 | +12V | 6 |
| 8 | GND | |
| 9 | N/C | |
| 10 | N/C | |
| 11 | RX + (DigiCart Receiver, wire to TX+) | 8 |
| 12 | RX – (DigiCart Receiver, wire to TX-) | 9 |
| 13 | Remote Present signal (Not Used) | |
| 14 | +12V | 7 |
| 15 | GND |
ALSO – Connect Pin 15 to Pin 1 and Pin 8 to Pin 3 on 15 pin connector side