WARNING: Improper cable wiring may result in damage to the system.
The following details wiring for an RC-220, DB9 to DB9. See notes for optional power injection on pins 6 and 7.
DigiCart Serial Port Pinout
| DigiCart9 Pin D-Sub male SIGNAL | RC-2209pin D Sub female | |
| 1 | GND (RC-220 alternate DC power ground) | 1 |
| 2 | +5 VOLTS (Not normally used) | 2 |
| 3 | GND (RC-220 alternate DC power ground) | 3 |
| 4 | TX + (DigiCart Transmitter, wire to RX+) | 4 |
| 5 | TX – (DigiCart Transmitter, wire to RX-) | 5 |
| 6 | HSK Out (Not normally used)(RC-220 alternate +9 volt DC power) | 6 |
| 7 | HSK In (Not normally used)(RC-220 alternate +9 volt DC power) | 7 |
| 8 | RX + (DigiCart Receiver, wire to TX+) | 8 |
| 9 | RX – (DigiCart Receiver, wire to TX-) | 9 |
The maximum length of the cable is 1200 meters or 3936 feet. Terminate the Rx+ and Rx- on each end of the cable with 1K resistors to ground if you are running over fifty feet of cable. If using a power injection cable, it can be no more than 25 feet long, but it can be placed at the end of a longer cable run.
WARNING: Do not apply power to both the rear panel of the RC-220 and the power injector on the cable at the same time.
Pins 6 and 7 are used to inject power into the RC-220 as an alternative to the rear panel power input on the back of the RC-220. The center pin (+9V) of an inline female coax connector is tied to both pins 6 and 7 at the DigiCart end of the cable in order to minimize voltage drop.
Important: Pins 6 and 7 on DigiCart end of the cable on the actual connector are left unconnected.
The outside of the coax connector connects to ground on both pins 1 and 3, which are carried through from the DigiCart to the RC-220.
For an RC-320 connected to a DigiCart E series system, the following details the DB15 to DB9 connection.
DigiCart/E Remote Control cable pinout
| DigiCart/E15 Pin D-Sub male SIGNAL |
RC-320 9pin 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 |
In addition- Connect Pin 15 to Pin 1 and Pin 8 to Pin 3 on 15 pin connector side