Relay Connection; Control Of Mechanical Brake - Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual

FC 300 Operating Instructions

Relay Connection

To set relay output, see parameter group 5-4*
Relays.

Control of Mechanical Brake

In hoisting/lowering applications, you need to be able to control an electro-mechanical brake.
Control the brake using any relay output or digital output (terminal 27 or 29).
•
Keep the output closed (voltage-free) as long as the frequency converter is unable to 'support' the
•
motor, for example due to the load being too heavy.
• Select Mechanical brake control [32] in par. 5-4* for applications with an electro-mechanical brake.
• The brake is released when the motor current exceeds the preset value in par. 2-20.
• The brake is engaged when the output frequency is less than the frequency set in par. 2-21 or 2-22,
and only if the frequency converter carries out a stop command.
If the frequency converter is in alarm mode or in an overvoltage situation, the mechanical immediately
brake cuts in.
How to Install
Terminals for relay connection.
MG.33.A2.02 - VLT is a registered Danfoss trademark
No. 01 - 02 make (normally open)
01 - 03 break (normally closed)
04 - 05 make (normally open)
04 - 06 break (normally closed)
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