Danfoss FC 301 User 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:
• 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.
• Select
Mechanical brake control [32] in par. 5-4* for applications with an electro-me-
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.
If the adjustable frequency drive is in alarm mode or in an overvoltage situation, the mechanical
brake immediately cuts in.
VLT
®
AutomationDrive FC 300 Instruction
Manual
3. How to Install
MG.33.A9.22 - VLT is a registered Danfoss trademark 43
3

Danfoss FC 301 Specifications

General

Brand	Danfoss
Model	FC 301
Category	Controller
Language	English