5 Installation
5.3 Interfaces
34
HMI/PLC XV-102
08/2016 MN04802004Z-EN
www.eaton.com
5.3.4
RS232 (System Port)
The RS232 interface is
not
galvanically isolated.
Tab. 9 Pin assignment of the RS232 interface
Wiring
Screened cables must be used.
The maximal baud rate depends on the cable length
Tab. 10 Relationship of cable length / baud rate
CAUTION
Non-galvanically-isolated interfaces
The device may be damaged by potential differences.
The GND terminals of all bus modules must be connected.
Fig.. 13 RS232 interface (9-pin, D-Sub, male, UNC)
Pin
Signal
Configuration
1
DCD
Data Carrier Detected
2
RxD
Receive Data
3
TxD
Transmit Data
4
DTR
Data Terminal Ready
5
GND
Ground
6
DSR
Data Set Ready
7
RTS
Request to Send
8
CTS
Clear To Send
9
RI
Ring Indicator
1
6
7
8
9
2
3
4
5
Cable length
Max. baud rate
2.5 m
115200 bit/s
5 m
57600 Bit/s
10 m
38400 Bit/s
15 m
19200 Bit/s
30 m
9600 Bit/s
When preparing the cables, ensure that there is a low-resistance connection between
the cable screen and the connector casing (
