RS232 serial printer cable (DB9-DB25)
Use this cable between two a computer (DTE) and a printer (DTE) devices.
 | DB9 pin D-SUB female to the PC |
 | DB25 pin D-SUB female to the printer |
| DB9 | DB25 | ||
|---|---|---|---|
| Receive Data | 3 | 3 | Transmit Data |
| Transmit Data | 2 | 2 | Receive Data |
| Clear To Send + Data Set Ready | 8 + 6 | 20 | Data Terminal Ready |
| Carrier Detect + Data Terminal Ready | 1 + 4 | ||
| Ground | 5 | 7 | Ground |
The DB25 side matches the serial printer connector pinout; the computer side follows the DB9 pinout. Signal names for all 25 pins are on the 25 pin RS232 pinout page and the RS232 connector pinouts page; a DB25-DB25 printer cable is also described. To record everything an application sends to a serial printer, use Serial Printer Logger.