Hardware Information
7-10
SIMATIC Field PG P4 Manual
A5E00180080-04
The serial port COM has the following pinout:
1
5
6
9
Pin No. Designation Description Input /Output
1 DCD Data carrier detect Input
2 RxD Receive data Input
3 TxD Transmit data Output
4 DTR Data terminal ready Output
5 GND Ground -
6 DSR Data set ready Input
7 RTS Request to send Output
8 CTS Clear to send Input
9 RI Incoming call Input
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