Steca coolcept Bedienungsanleitung Seite 99

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
–
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
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.
See ⑥ under Ä 3.1.1, p. 86 and ⑦ and ⑨ under Ä 3.1.2, p. 87.
2)
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.
Energy management unit StecaGrid SEM: Interface to a ripple control receiver for EEG com-
n
pliant feed-in management
PC or notebook (with suitable software, for technical professionals only):
n
– 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.
External data loggers, recommended by Steca for professional system monitoring:
n
– 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.
747.431 | Z08 | 2014-01-31
and 8
1) 1)
1) and 8 1) of the RS485 bus
of the RS485 bus are con-
2)
2) are connected, e. g.
GB
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