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Danfoss VLT series Design Guide

Danfoss VLT series
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Break-away torque
η
VLT
The efficiency of the adjustable frequency drive is defined as the ratio between the power output
and the power input.
Start-disable command
A stop command belonging to the group 1 control commands - see this group.
Stop command
See Control commands.
References:
Analog Reference
A signal transmitted to the analog inputs 53 or 54 can be voltage or current.
Bus Reference
A signal transmitted to the serial communication port (FC port).
Preset Reference
A defined preset reference to be set from -100% to +100% of the reference range. Selection of
eight preset references via the digital terminals.
Pulse Reference
A pulse frequency signal transmitted to the digital inputs (terminal 29 or 33).
Ref
MAX
Determines the relationship between the reference input at 100% full scale value (typically 10 V,
20 mA) and the resulting reference. The maximum reference value set in par. 3-03.
Ref
MIN
Determines the relationship between the reference input at 0% value (typically 0 V, 0 mA, 4 mA)
and the resulting reference. The minimum reference value set in par. 3-02.
Miscellaneous:
Analog Inputs
The analog inputs are used for controlling various functions of the adjustable frequency drive.
VLT
®
HVAC Drive Design Guide 1. How to Read this Design Guide
MG.11.B4.22 - VLT
®
is a registered Danfoss trademark.
9
1

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Danfoss VLT series Specifications

General IconGeneral
SeriesVLT
CategoryDC Drives
Output Voltage0-100% of input voltage
Protection FeaturesOvervoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication InterfacesProfibus, CANopen
Enclosure RatingIP20, IP21, IP55, IP66
Cooling MethodForced Air Cooling, Convection Cooling
Control ModeSensorless Vector, Closed Loop Vector
Ambient Temperature-10°C to +50°C (14°F to 122°F)

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