5 External connections
5.4 Serial interfaces to other devices
50
Compact PLC XC-152
05/17 MN050001ZU EN www.eaton.com
5.4.1 RS232 (System Port)
Characteristics: SUB-D plug 9-pole, not galvanically isolated,
UNC nuts to keep the connector in place.
5.4.1.1 RS-232 wiring
•
Screened cables must be used.
•
The maximum baud rate (Baud rate) will depend on the cable length.
RS232 cable length based on baud rate
SUB-D plug
9-pole
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
5
4
3
2
1
9
8
7
6
Cable length
Possible 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