6.5. Additional Connections6.5.1. DC bus connectionThe DC bus terminal is used for DC back-up, with the intermediate circuit being supplied from anexternal source.Terminal numbers: 88, 89Please contact Danfoss if you require further information.6.5.2. Installing Load SharingThe connection cable must be shielded, and the max. length from the adjustable frequency driveto the DC bar is 81 ft. [25 m].NOTEDC bus and load sharing require extra equipment and safety considerations. Forfurther information, see Load Sharing Instructions MI.50.NX.YY.NOTEVoltages of up to 975 V DC (@ 600 V AC) may occur between the terminals.6.5.3. Brake Connection OptionThe connection cable to the brake resistormust be shielded/armored. No.81 82 Brake resistorR- R+terminalsNOTEDynamic brake calls for extra equipment and safety considerations. For further in-formation, please contact Danfoss.1. Use cable clamps to connect the shield to the metal cabinet of the adjustable frequencydrive and to the decoupling plate of the brake resistor.2. Dimension the cross-section of the brake cable to match the brake current.NOTEVoltages of up to 975 V DC (@ 600 V AC) may occur between the terminals.6. How to Install FC 300 Design Guide130 MG.33.B9.22 - VLT® is a registered Danfoss trademark.6
