3 Product Overview
3.1 Intended Use
A frequency converter is an electronic motor controller that uses 1 or more drive modules to convert AC mains input into a
variable AC waveform output. The frequency and voltage of the output are regulated to control the motor speed or torque.
The frequency converter varies the motor speed based on system feedback, such as position sensors on a conveyor belt.
The frequency converter also regulates the motor in response to remote commands from external controllers.
The VLT
®
Parallel Drive Modules basic kit described in this guide is UL 508 C compliant. The kit is used to create drive
systems of 2 or 4 drive modules. These drive modules are based on the D4h frequency converter and can provide a greater
power range in a smaller enclosure. The basic kit is designed to allow the exibility to either order components through
Danfoss or fabricate custom components.
The basic kit contains the following components:
•
Drive modules
•
Control shelf
•
Wire harnesses
- Ribbon cable with 44-pin connector (on both ends of the cable)
- Relay cable with 16-pin connector (on 1 end of the cable)
- DC fuse microswitch cable with 2-pin connectors (on 1 end of the cable)
•
DC fuses
•
Microswitches
Other components, such as bus bar kits and back-channel cooling duct kits, are available as options to customize the drive
system.
NOTICE
EXTERNAL 230 V SUPPLY
An external 230 V supply is needed to power the SMPS
(switch mode power supply) and any cabinet fans.
Product Overview Installation Guide
MG37K302 Danfoss A/S © 08/2017 All rights reserved. 7
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