Siemens SIMATIC IPC477D - Hardware Descriptions; External Ports; Com1;Com2

Technical information
8.5 Hardware descriptions
SIMATIC IPC477D, IPC477D PRO
226 Operating Instructions, 11/2016, A5E31347228-AF
8.5
Hardware descriptions
8.5.1
External ports
8.5.1.1
COM1/COM2
Serial port COM1, 9-pin (plug) or COM2
Pin no.
Short description
Meaning
Input / output
1
DCD
Data carrier detect
Input
2
RxD
Received data
Input
3
TxD
Transmit data
Output
4
DTR
Data terminal ready
Output
5
GND
Ground
-
6
DSR
Ready for operation
Input
7
RTS
Request to send
Output
8
CTS
Clear to send
Input
9
RI
Incoming call
Input