Additional Connections - Danfoss FC 300 Design Manual

6. How to Install

6.5. Additional Connections

6.5.1. DC bus connection
The DC bus terminal is used for DC back-up, with the intermediate circuit being supplied from an
external source.
Terminal numbers: 88, 89
Please contact Danfoss if you require further information.
6.5.2. Installing Load Sharing
The connection cable must be shielded, and the max. length from the adjustable frequency drive
6
to the DC bar is 81 ft. [25 m].
6.5.3. Brake Connection Option
The connection cable to the brake resistor
must be shielded/armored.
1.
2.
130
NOTE
DC bus and load sharing require extra equipment and safety considerations. For
further information, see Load Sharing Instructions MI.50.NX.YY.
NOTE
Voltages of up to 975 V DC (@ 600 V AC) may occur between the terminals.
NOTE
Dynamic brake calls for extra equipment and safety considerations. For further in-
formation, please contact Danfoss.
Use cable clamps to connect the shield to the metal cabinet of the adjustable frequency
drive and to the decoupling plate of the brake resistor.
Dimension the cross-section of the brake cable to match the brake current.
NOTE
Voltages of up to 975 V DC (@ 600 V AC) may occur between the terminals.
MG.33.B9.22 - VLT
No 81 82 Brake resistor
.
R- R terminals
+
® is a registered Danfoss trademark.
FC 300 Design Guide