Siemens SIMATIC IPC277G User Manual

Technical specifications
8.5 Hardware descriptions
SIMATIC IPC277G
94 Operating Instructions, 08/2021, A5E50059956-AA
8.5.2.6 Serial interface
RS232
RS422
RS485
Pin assignment RS232
Pin
Short description
Meaning
1
DCD
Data carrier detect (I)
2
RxD
Received data (I)
3
TxD
Transmitted data (O)
4
DTR
Data terminal ready (O)
5
M
Ground
6
DSR
Data set ready (I)
7
RTS
Request to send (O)
8
CTS
Clear to send (I)
9
RI
Incoming call (I)
Pin assignment RS422
Pin
Short description
Meaning
1
TX-
Transmit data - (O) for full-duplex mode
2
TX+
Transmit data + (O) for full-duplex mode
3
RX+
Receive data + (I) for full-duplex mode
4
RX-
Receive data - (I) for full-duplex mode
5
M
Signal ground
6
nc
7
nc
8
nc
9
nc
Pin assignment RS485
Pin
Short description
Meaning
1
Data-
Transmit / receive data - (I/O) for half-duplex mode
2
Data+
Transmit / receive data+ (I/O) for half-duplex mode
3
nc
4
nc
5
M
Signal ground
6
nc
7
nc
8
nc
9
nc

Siemens SIMATIC IPC277G Specifications

General

Brand	Siemens
Model	SIMATIC IPC277G
Category	Industrial PC
Language	English