
FC 300 Operating Instructions
How to Install
Relay Connection
To set relay output, see parameter group 5-4*
Relays.
No.
01 - 02
make (normally open)
01 - 03
break (normally closed)
04 - 05
make (normally open)
04 - 06
break (normally closed)
Terminals for relay connection.
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.
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MG.33.A2.02 - VLT is a registered Danfoss trademark