DB9 to 8-Pin Modular Adapter Pinouts
To connect the COM port to the DB9 serial port of a PC, use an adapter wired as shown:
Table 13. DB9 to
Pin |
| Direction | PC RS232 Serial Port | Pin | ||
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1 | Transmit Data | TxD | → | RxD | Receive Data | 2 |
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2 | Data Set Ready | DSR | ← | RTS | Request to Send | 7 |
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4 | Receive Data | RxD | ← | TxD | Transmit Data | 3 |
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5 | Ground | GND | ↔ | GND | Ground | 5 |
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6 | Data Terminal Ready | DTR | → | CTS | Clear to Send | 8 |
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Pins not shown are unused.
25
