connector wiring scheme
9 pin D-SUB female
connector
9 pin D-SUB male
connector
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | CD | IN | Carrier Detect |
| 2 | RXD | IN | Receive Data |
| 3 | TXD | OUT | Transmit Data |
| 4 | GND | - | System Ground |
| 5 | CTS | IN | Clear to Send |
| 6 | DSR | IN | Data Set Ready |
| 7 | RI | IN | Ring Indicator |
| 8 | RTS | OUT | Request to Send |
| 9 | DTR | OUT | Data Terminal Ready |
Notes
- Direction is DTE (Computer) relative DCE (Scanner).