9-Pin Male
DB-9 External Connector
Use these wiring instructions for male 9-pin DB-9 external
plugs.
|
|
Pin 2 |
Pin 3 |
Pin 1 |
Pins 4 and 6 |
Pin 7 |
Pin 8 |
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The signals and names for the DB-9 connector are as follows.
|
|
|
1 |
DCD |
Data Carrier Detect |
2 |
RxD |
Receive Data |
3 |
TxD |
Transmit Data |
4 |
DTR |
Data Terminal Ready |
5 |
SGND |
Signal Ground |
6 |
DSR |
Data Set Ready |
7 |
RTS |
Request To Send |
8 |
CTS |
Clear To Send |
9 |
RI |
Ring Indicator |
|