Note
If in the country setting
Italy is set, then the RS485 bus must be connected as follows to enable
control through an external device in accordance with CEI 0-21.
– External fast switch-off (ital.:
Teledistacco): If the lines 3
1)
and 8
1)
of the RS485 bus
2)
are
connected, e. g. via an external relay, the following applies:
Relay closes: The inverters on the bus disconnect themselves from the network.
Relay opens: The inverters connected on the network connect themselves to the network
(regular operation).
– Changeover of the switch-off thresholds of the grid frequency (ital.: Modalità definitiva di
funzionamento del sistema di protezione di interfaccia (impiego del SPI sulla base di
letture locali e di informazioni/comandi esterni)): If the lines 5
1)
and 8
1)
of the RS485 bus
2)
are connected, e. g. via an external relay, the following applies:
Relay closes: The inverters connected on the bus set the switch-off thresholds in
accordance with CEI 0-21 to 47.5 Hz and 51.5 Hz.
Relay opens: The inverters connected on the bus set the switch-off thresholds in
accordance with the country setting Italy see section Technical data.
We recommend that you integrate the wiring of lines 3, 5, and 8 in the bus termination.
1)
Contact assignment of the RJ45 plug for the RS485 bus: See
Fig. 8.
2)
See
⑥
under
Ä
3.1, p. 14 and
⑦
and
⑨
under
Ä
3.1, p. 14.
Fig. 8: Contact assignment (= line number) of the RJ45 plug
Optionally one (!) of the following masterdevices 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 EEC-
compliant feed-in management
n PC or notebook (with suitable software):
–
Read inverter information using the "StecaGrid User" read out software. This is available on
our homepage see http://www.steca.com/index.php?StecaGrid_User_de
– Connection to the inverter via optional adapter RS485⇔USB is possible; the adapter is
available from Steca under Article Number 746.610 (IP21) or 737.707 (IP65).
– Load firmware updates (for technical professionals only)
n External data loggers, recommended by Steca for professional system monitoring:
– WEB‘log (Meteocontrol)
– Solar-Log (Solare Datensysteme)
– Energy-Manager (Kiwigrid GmbH)
EN
747,431 | Z09 | 2015-09-30
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