User manual
Notice
If a country setting of Italy is set then the RS485 bus must be wired as follows in order to allow
control via an external device as per CEI 0-21.
–
External fast disconnection (Ital.: Teledistacco): If wires 3
1)
and 8
1)
of the RS485 bus
2)
are con-
nected, e. g. via an external relay, then the following applies:
Relay closes: The inverters connected to the bus disconnect themselves from the grid.
Relay opens: The inverters connected to the bus connect themselves from to the grid (normal
operation).
–
Switch-over of the grid frequency disconnection thresholds (ital.: Modalità definitiva di fun-
zionamento del sistema di protezione di interfaccia (impiego del SPI sulla base di letture locali
e di informazioni/comandi esterni)): If wires 5
1)
and 8
1)
of the RS485 bus
2)
are connected, e. g.
via an external relay, then the following applies:
Relay closes: The inverters connected to the bus set the switch-off thresholds as per CEI 0-21
to 47.5 Hz and 51.5 Hz.
Relay opens: The inverters connected to the bus set the switch-off thresholds as per the Italy
country setting; see the Technical Data section.
We recommend integrating the interconnection of wires 3, 5 and 8 into the bus termination.
1)
Pin assignments of the RJ45 plug for the RS485 bus: see
Fig. 4.
2)
See ⑥ under Ä 3.1.1, p. 86 and ⑦ and ⑨ under Ä 3.1.2, p. 87.
81
Fig. 4: Pin assignments (= wire number) of the RJ45 plug
One
(!) of the following
master
devices can be connected to the RS485 bus. The devices support the
transfer protocol used by the inverter.
n Energy management unit StecaGrid SEM: Interface to a ripple control receiver for EEG com-
pliant feed-in management
n PC or notebook (with suitable software, for technical professionals only):
–
Load firmware updates
– Read inverter information using Steca service software
– An optional RS485⇔USB adapter for connecting to the inverter is also available from Steca.
n External data loggers, recommended by Steca for professional system monitoring:
– WEB‘log (Meteocontrol)
– Solar-Log (Solare Datensysteme)
Notice
The correct settings must be made in external data loggers, according to the manufacturer's
instructions, before connecting them to the bus.
GB
747.431 | Z08 | 2014-01-31
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