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 Request to Send/Clear to Send (RTS/CTS) for hardware handshaking. The following cable wiring supports this method.
| DB-9 (Digi End) |
DB-9 Male (Terminal/Printer) |
|||
|---|---|---|---|---|
| Signal | Pin | Pin | Signal | |
|
DCD+DSR |
1+6 |
connected to |
4 |
DTR |
|
RxD |
2 |
connected to |
3 |
TxD |
|
TxD |
3 |
connected to |
2 |
RxD |
|
DTR |
4 |
connected to |
1+6 |
DCD+DSR |
|
SG |
5 |
connected to |
5 |
SG |
|
RTS |
7 |
connected to |
8 |
CTS |
|
CTS |
8 |
connected to |
7 |
RTS |
|
GND |
Shell |
connected to |
Shell |
GND |
Important: Other printer manufacturers may use different methods of flow control. Consult your printer's documentation for specific wiring requirements.