DB9 Pinout
The pins below are found on a typical male (terminal side, or DTE) DB-9 serial port connector:
Pin | Signal | Direction | Description |
---|---|---|---|
1 | DCD | IN | Carrier Detect |
2 | RXD | IN | Receive Data |
3 | TXD | OUT | Transmit Data |
4 | DTR | OUT | Data Terminal Ready |
5 | GND | - | Signal Ground |
6 | DSR | IN | Data Set Ready |
7 | RTS | OUT | Request To Send |
8 | CTS | IN | Clear To Send |
9 | RI | IN | Ring Indicator |