Relay Connection; Control Of Mechanical Brake - Danfoss FC 300 Instruction Manual

FC 300 Instruction Manual

Relay connection

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

Control of Mechanical Brake

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In hoisting/lowering applications, you need to be able to control an electromechanical brake.
Control the brake using any relay output or digital output (terminal 27 or 29).
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Keep the output closed (voltage-free) as long as the adjustable frequency drive is unable to
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"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 electromechanical brake.
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• 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
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2-22, and only if the adjustable frequency drive carries out a stop command.
If the adjustable frequency drive is in alarm mode or in an overvoltage situation, the
mechanical brake immediately cuts in.
How to Install
Terminals for relay connection.
MG.33.A2.22 - 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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