Additional Connections; Mechanical Brake Control - Danfoss FC 301 Instruction Manual

VLT ® AutomationDrive FC 300 Instruction
Manual

3.7. Additional Connections

3.7.1. Mechanical Brake Control

In hoisting/lowering applications, it is necessary to be able to control an electro-
mechanical brake:
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If the adjustable frequency drive is in alarm mode or in an overvoltage situation, the mechanical
brake immediately cuts in.
Control the brake using any relay output or digital output (terminal 27 or 29).
Keep the output closed (voltage-free) as long as the adjustable frequency drive is unable
to 'support' the motor, such as when the load is too heavy, for example.
Mechanical brake control
Select
chanical brake.
The brake is released when the motor current exceeds the preset value found in par.
2-20.
The brake is engaged when the output frequency is less than the frequency found in par.
2-21 or 2-22, and only if the adjustable frequency drive carries out a stop command.
MG.33.A9.22 - VLT is a registered Danfoss trademark
[32] in par. 5-4* for applications with an electro-me-
3. How to Install
3
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