The following cable wiring supports most serial terminals or printers with either software or hardware handshaking. This cable is valid with any Digi DB-9 serial port.
Most terminals and printers use Data Terminal Ready (DTR) for Ready/Busy hardware handshaking. The following cable wiring supports this method.
| DB-9 (Digi End) |
DB-9 Male (Terminal/Printer) |
|||
|---|---|---|---|---|
| Signal | Pin | Pin | Signal | |
RTS |
7 |
connected to | 8 |
CTS |
GND |
Shell |
connected to | Shell |
GND |
TxD |
3 |
connected to | 2 |
RxD |
RxD |
2 |
connected to | 3 |
TxD |
SG |
5 |
connected to | 5 |
SG |
CTS |
8 |
connected to | 4 |
DTR |
DTR |
4 |
connected to | 1 & 6 |
DCD and DSR |
DCD and DSR |
1 & 6 |
connected to | 7 |
RTS |
Important: Other printer manufacturers may use different methods of flow control. Consult your printer's documentation for specific wiring requirements.