Connecting An External Power Supply; General; Safety - Fronius String Control 250/25 DCD DF Instructions De Service

Connecting an External Power Supply

General

The Fronius String Control 250/25 DCD DF 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 DCD DF 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 DCD DF.

Safety

Connecting an
External Po-
wer Supply
Important! The power supply cable must be fed through the silicon tube
like the data communication cable.
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.
1
Disconnect the metric screw joint for the data communication cables
Remove the rubber insert
2
Feed the power supply cable into the Fronius String Control 250/25
3
DCD DF
Insert power supply cable into the silicon tube
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