RS422公頭連接器
RS422母頭連接器
RS422介面定義
| Pin | Name | Dir | 功能描述 |
|---|---|---|---|
| 1 | GND |  | Shield Ground |
| 2 | SRI |  | Signal Rate Indicator |
| 3 | n/c | - | Spare |
| 4 | SD |  | Send Data |
| 5 | ST | | Send Timing |
| 6 | RD | | Receive Data |
| 7 | RTS | | Request To Send |
| 8 | RR | | Receiver Ready |
| 9 | CTS | | Clear To Send |
| 10 | LL | | Local Loopback |
| 11 | DM | | Data Mode |
| 12 | TR | | Terminal Ready |
| 13 | RR | | Receiver Ready |
| 14 | RL | | Remote Loopback |
| 15 | IC | | Incoming Call |
| 16 | SF/SR | | Select Frequency/Select Rate |
| 17 | TT | | Terminal Timing |
| 18 | TM | | Test Mode |
| 19 | GND | | Ground |
| 20 | RC | | Receive Twister-Pair Common |
| 21 | GND | | Spare Twister-Pair Return |
| 22 | /SD | | Send Data TPR |
| 23 | GND | | Send Timing TPR |
| 24 | GND | | Receive Timing TPR |
| 25 | /RS | | Request To Send TPR |
| 26 | /RT | | Receive Timing TPR |
| 27 | /CS | | Clear To Send TPR |
| 28 | IS | | Terminal In Service |
| 29 | /DM | | Data Mode TPR |
| 30 | /TR | | Terminal Ready TPR |
| 31 | /RR | | Receiver TPR |
| 32 | SS | | Select Standby |
| 33 | SQ | | Signal Quality |
| 34 | NS | | New Signal |
| 35 | /TT | | Terminal Timing TPR |
| 36 | SB | | Standby Indicator |
| 37 | SC | | Send Twister Pair Common |
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