User Manual

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1
Feed the power supply cable into the Fronius String Control 250/25
(e.g. together with data communication cables within the silicon tube)
Connecting an External Power Supply
General The Fronius String Control 250/25 is supplied power through Solar Net.
The power supply from Solar Net, however, may no longer be sufficient
when combined with additional DATCOM components or when data com-
munication cables exceed a length of 100 m.
In this case, an external power supply is available.
For reasons of access, Fronius recommends that the external power
supply be plugged into another DATCOM component rather than the
Fronius String Control 250/25 whenever possible.
If there is no other easier connection option, the following describes the
work steps involved in connecting the external power supply to the Froni-
us String Control 250/25.
WARNING! An electrical shock can be fatal. Danger from DC
voltage from solar modules.
- Make sure that the input and output sides in front of the
device are not charged before connecting anything.
- Any and all connections should only be carried out by quali-
fied electricians.
- Follow the safety rules in these operating instructions.
Safety
Connecting an
External Po-
wer Supply
2
1
* Silicon tube
*