Danfoss VLT AutomationDrive FC 300 Design Manual page 122

6. How to Install
Ensure that the power supply can supply the necessary current to the frequency converter.
If the unit is without built-in fuses, ensure that the appropriate fuses have the correct current rating.
6.5.13. External Fan Supply
In case the frequency converter is supplied by DC or if the fan must run independently of the power supply, an external power supply can be applied.
The connection is done to the power card.
Terminal No.
100, 101
102, 103
The connector located on the power card provides the connection of line voltage for the cooling fans. The fans are connected from factory to be supplied
form a common AC line (jumpers between 100-102 and 101-103). If external supply is needed, the jumpers are removed and the supply is connected
to terminals 100 and 101. A 5 Amp fuse should be used for protection. In UL applications this should be LittelFuse KLK-5 or equivalent.
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Function
Auxiliary supply S, T
Internal supply S, T
MG.33.BA.02 - VLT ® is a registered Danfoss trademark
FC 300 Design Guide