Hardware Descriptions; External Ports; Com1 / Com2 - Siemens SIMATIC IPC427E Operating Instructions Manual

Technical specifications

8.6 Hardware descriptions

8.6 Hardware descriptions
8.6.1

External ports

8.6.1.1

COM1 / COM2

RS-232 assignment
Pin
1
2
3
4
5
6
7
8
9
Pin assignment RS422
Pin
1
2
3
4
5
6
7
8
9
112
Short description
DCD
RxD
TxD
DTR
M
DSR
RTS
CTS
RI
Short description
TX-
TX+
RX+
RX-
M
nc
nc
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, 09/2017, A5E37454814-AB
SIMATIC IPC427E