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Technical specifications
8.5 Hardware description
8.5.2.2
DC in connector
Pin
1
2
8.5.2.3
Serial interface
Pin assignment RS232
Pin
1
2
3
4
5
6
7
8
9
Pin assignment RS422
Pin
1
2
3
4
5
6
7
70
Short description
24V
GND
Short description
DCD
RxD
TxD
DTR
M
DSR
RTS
CTS
RI
Short description
TX-
TX+
RX+
RX-
M
nc
nc
RS232
RS422
RS485
Meaning
Data carrier detect (I)
Received data (I)
Transmitted data (O)
Data terminal ready (O)
Ground
Data set ready (I)
Request to send (O)
Clear to send (I)
Incoming call (I)
Meaning
Transmit data - (O) for full-duplex mode
Transmit data + (O) for full-duplex mode
Receive data + (I) for full-duplex mode
Receive data - (I) for full-duplex mode
Signal ground
Operating Instructions, 06/2019, A5E40965249-AD
SIMATIC IPC377E
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