Siemens SIMATIC IPC427D - Hardware Descriptions

Technical specifications
8.6 Hardware descriptions
SIMATIC IPC427D
122 Operating Instructions, 05/2017, A5E31347215-AB
8.6
Hardware descriptions
8.6.1
External ports
8.6.1.1
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