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DB9 to RJ45 Adapter Pinouts
To connect the COM port to the DB9 serial port of a PC, use an adapter wired as shown:
Table 5. DB9 to RJ45 Adapter Pinouts
Pin
RJ45 Port
1
Transmit Data
2
Data Set Ready
4
Receive Data
5
Ground
6
Data Terminal Ready
Pins not shown are unused.
Direction PC RS232 Serial Port
→
TxD
←
DSR
←
RxD
↔
GND
→
DTR
15
RxD
Receive Data
RTS
Request to Send
TxD
Transmit Data
GND Ground
CTS
Clear to Send
Pin
2
7
3
5
8
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