Fronius String Control 250/30 DCD DF - Manual (Page 78)

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Connecting an external power supply
General The Fronius String Control 250/30 DCD DF is powered via the Fronius Solar Net.
The power supplied via the Fronius Solar Net may not be sufficient if additional Fronius
DATCOM components are present or if the data communication cables are more than 100
m long.
In this case, power is supplied in the following ways:
-
via a DIN rail power pack that be optionally integrated in the Fronius String Control
250/30 DCD DF
- via one of the other Fronius DATCOM components in SolarNet
- via an external power pack
Fronius recommends supplying power externally via the optional DIN rail power pack or
one of the other Fronius DATCOM components in SolarNet, if possible.
If there is no simpler connection, the following work instruction describes how to connect
the external power pack to the Fronius String Control 250/30 DCD DF.
Safety
Connecting an
external power
supply Detach the metric screw joint for the data communication cable
Remove the rubber insert
Introduce the power pack cable into the Fronius String Control 250/30 DCD DF
IMPORTANT! The power pack cable must pass through a silicone tube, just like the data
communication cable.
NOTE! Due to the challenging nature of operating conditions, only the Froni-
us original DIN rail power pack (item number 43,0001,3405) may be in-
stalled.
WARNING! An electric shock can be fatal. Danger from DC voltage in PV mod-
ules.
-
Make sure that both the input side and output side of the device are de-ener-
gised before attaching any connections.
- All connections must be made by qualified electricians.
- Note the safety rules in these operating instructions.
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