Serial Port Rs232; Rs232 Connector; Connection Of Rs232 Connector - Advantech SmartStart SL305 User Manual

5.9.6 Serial Port RS232

This interface is physically connected through the DB9 Female connector.
Pin Signal mark
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
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Description
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
System Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
Table 10: Connection of RS232 connector
Figure 22: RS232 connector
23
SmartStart SL305
Data flow direction
Output
Output
Input
Input
—
Output
Input
Output
NC