60
2.10 Communication Interface
Pin-No.
RS485-Interface
Modbus and
IEC 60870-5-103
PROFIBUS-Interface
1 Protective Earth Protective Earth
2
3 A B (RxD/TxD-P)
4 RTS CTRL-A
5 GND GND
6 +5 V +5 V
7
8 B A (RxD/TxD-N)
9
The bus is terminated at the connection cable.
The isolated interface supply voltage is provided via the
D-subminiature female connector. Therefore, the matching
resistors for signals can be connected to the cable.
WARNING!
All computing devices connected to the RS485 communication
interface port shall be connected to a SELV (Separated Extra Low
Voltage) circuit and must comply with the following standard:
IEC/EN 60950.
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