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RS232 to RS485 / RS422 ConvertersYour header in Here
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RS232 Pinout
Below is the pinout of a typical standard male 9-pin RS232 connector, this connector type is also referred to as a DB9 connector.
A computer's serial COM port (DTE) is usually a male port as shown below, and any peripheral devices you connect to this port usually has a female connector (DCE).
This table shows the pin numbers with signal names and the signal direction.
| Pin | Signal | Signal Name | DTE Signal direction |
|---|---|---|---|
| 1 | DCD | Data Carrier Detect | In |
| 2 | RXD | Receive Data | In |
| 3 | TXD | Transmit Data | Out |
| 4 | DTR | Data Terminal Ready | Out |
| 5 | GND | Ground | - |
| 6 | DSR | Data Set Ready | In |
| 7 | RTS | Request to Send | Out |
| 8 | CTS | Clear to Send | In |
| 9 | RI | Ring Indicator | In |
