relay1relay20302240Vac, 2A240Vac, 2A400Vac, 2A01060504130BA047.10Illustration 7.53 E- and F-Frame Additional Relay Outputs7.5.11 Brake Resistor Temperature SwitchFrame Size D-E-FTorque: 0.5-0.6 Nm (5 in-lbs)Screw size: M3This input monitors the temperature of an externallyconnected brake resistor. If the input between 104 and 106is established, the frequency converter trips on warning/alarm 27, “Brake IGBT”. If the connection is closed between104 and 105, the frequency converter trips on warning/alarm 27, “Brake IGBT.”Install a KLIXON switch that is “normally closed”. If thisfunction is not used, short circuit 106 and 104 together.Normally closed: 104-106 (factory installed jumper)Normally open: 104-105Terminal no. Function106, 104, 105 Brake resistor temperature switch.Table 7.68 Brake Resistor Temperature Switch TerminalsNOTICEIf the temperature of the brake resistor gets too highand the thermal switch trips, the frequency converterstops braking and the motor coasts.175ZA877.10106NC104C105NOIllustration 7.54 Brake Resistor Temperature SwitchInterconnect7.6 Additional Connections7.6.1 DC Bus ConnectionThe DC bus terminal is used for DC back-up, with theintermediate circuit being supplied from an externalsource.Terminal no. Function88, 89 DC BusTable 7.69 DC Bus TerminalsContact Danfoss if further information is required.7.6.2 Load SharingLoad Sharing calls for extra equipment and safety consid-erations. For further information, Load Sharing ApplicationNote.CAUTIONNote that voltages up to 1099 V DC mayoccur on the terminals.Terminal no. Function88, 89 LoadsharingTable 7.70 Load Sharing TerminalsThe connection cable must be screened and the maximumlength from the frequency converter to the DC bar islimited to 25 m (82 ft).Load sharing links together the DC intermediate circuits ofseveral frequency converters.WARNINGNote that mains disconnect may not isolate thefrequency converter due to DC link connection.7.6.3 Installation of Brake CableThe connection cable to the brake resistor must bescreened and the maximum length from the frequencyconverter to the DC bar is limited to 25 metres (82 ft).Electrical Installation VLT® AutomationDrive FC 300 Design Guide 90-1200 kW210 MG34S202 - Rev. 2013-08-1977
