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KESS Power Solutions Gmbh / www.kess.at / info@kess.at
6.14 CoMMUNiCATioN PoRT
RS232 port und USB port
The communications line -CoM- constitutes a very low voltage safety circuit. To
preserve the quality it must be installed separately from other lines carrying
dangerous voltages (power distribution lines).
The RS232 and USb interfaces are useful for the monitoring software and updating
the fi rmware.
it is not possible to use both ports at the same time.
The db9 connector supplies the RS232 signals and, in models up to 3 kVA, the
normally open (No) potential-free contacts (optocouplers). The maximum
voltage and current applicable to these contacts is 30V dC and 1A.
There also is a ‘ Shutdown ‘ input. it enables that the inverter is shut down when
this input has a voltage between 10 and 12 V for more than 1 second.
The RS232 port consists of the transmission of serial data in such a way that a large
amount of information can be sent through a communication cable with only
3 wires. The USb port is compatible with the USb 1.1 protocol for communication
software.
Pin#
Beschreibung
Eingang /
ausgang
1
End of the backup
output
2
Txd for RS232
output
3
Rxd for RS232
input
4
GNd for Shutdown
Earth
5
GNd for RS232
Earth
6
Common relays
-
7
Shutdown order
input
8
Low battery
output
9
Mains fault
output
Tab.2: Pinout for db9- RS-232-connectors
fig.16: Connectors for db9-, RS-232-Stecker and USb