The following four-wire cable is often sufficient for a terminal, printer, or other DTE device configured for DTR (hardware) flow control. However, some terminals and printers may use a signal other than DTR for flow control. In addition, some terminals and printers may have other cable requirements. Consult your terminal or printer manual for this information. For more universal compatibility, use a fully-wired DB-25 terminal/printer cable.
|
DB-25 Female (Digi End) |
DB-25 Male (Peripheral) |
|||
|---|---|---|---|---|
| Signal | Pin | Pin | Signal | |
|
TxD |
2 |
connected to |
3 |
RxD |
|
RxD |
3 |
connected to |
2 |
TxD |
|
CTS |
5 |
connected to |
20 |
DTR |
|
SG |
7 |
connected to |
7 |
SG |
|
GND |
Shell |
connected (via shield) to |
Shell |
GND |
|
jumpered |
4 & 5 |
RTS & CTS |
||
Note: Some Okidata printers use a control signal on pin 11, called Supervisory Send Data (SSD) instead of DTR. In this case, simply connect CTS on the female DB-25 side to pin 11 of the male DB-25, instead of pin 20.