핀 | RS-232 | RS-422 | RS485(4선) | RS485(2선) |
---|---|---|---|---|
1 | DCD | TXD-(A) | TXD-(A) | — |
2 | RxD | TXD+(B) | TXD+(B) | — |
3 | TxD | RXD+(B) | RXD+(B) | Data-(B) |
4 | DTR | RXD-(A) | RXD-(A) | Data-(A) |
5 | GND | GND | GND | GND |
6 | DSR | — | — | — |
7 | RTS | — | — | — |
8 | CTS | — | — | — |
9 | — | — | — | — |