RS232 “3 wire serial” connector v1¶
RS232 connector is 2x5 FC-10P 2.54mm dual row IDC socket connector.
RS232 connector and cable orientation
Both ends use same pinout, cross over needs to be in the cable. Pins 2, 3, and 5 must be connected.
| pin nr | name | description |
|---|---|---|
| 1 | DCD | Data carrier detect (optional). |
| 2 | RxD | Received data. |
| 3 | TxD | Transmitted data. |
| 4 | DTR | Data terminal ready (optional). |
| 5 | GND | Signal ground. |
| 6 | DSR | Data set ready (optional). |
| 7 | RTS | Request to send (optional). |
| 8 | CTS | Clear to send (optional). |
| 9 | RI | Ring indicator (optional). |
| 10 | NC | Not connected, used to avoid connecting wrong cable. Box header pin should be cut, and cable plugged for this pin. |
1.8.2021/pekka