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Standard 9 pin RS-232 Pinout:
| Pin |
Direction |
Name |
Description |
1
2
3
4
5
6
7
8
9 |
In
In
Out
Out
Gnd
In
Out
In
In |
CD
RXD
TXD
DTR
SG
DSR
RTS
CTS
RI |
Carrier Detect
Received Data
Transmitted Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Ring Indicator |
Standard 25 pin RS-232 Pinout:
| Pin |
Direction |
Name |
Description |
8
3
2
20
7
6
4
5
22 |
In
In
Out
Out
Gnd
In
Out
In
In |
CD
RXD
TXD
DTR
SG
DSR
RTS
CTS
RI |
Carrier Detect
Received Data
Transmitted Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Ring Indicator |
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