Siemens SIMATIC IPC RW-543A - Page 123

Hardware description
A.3 Internal Connector
SIMATIC IPC RW-543A
Operating Instructions, 03/2023, A5E52332059-AA
123
RS232
Pin
Short description
Meaning
1
DCD
Data carrier detect (I)
2
DSR
Data set ready (I)
3
RxD
Received data (I)
4
RTS
Request to send (O)
5
TxD
Transmitted data (O)
6
CTS
Clear to send (I)
7
DTR
Data terminal ready (O)
8
RI
Incoming call (I)
9
M
Ground
RS422
Pin
Short description
Meaning
1
TX-
Transmit data - (O) for full-duplex mode
2
nc
3
TX+
Transmit data + (O) for full-duplex mode
4
nc
5
RX+
Receive data + (I) for full-duplex mode
6
nc
7
RX-
Receive data - (I) for full-duplex mode
8
nc
9
M
Ground
RS485
Pin
Short description
Meaning
1
Data-
Transmit / receive data - (I/O) for half-duplex mode
2
nc
3
Data+
Transmit / receive data+ (I/O) for half-duplex mode
4
nc