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Danfoss VLT series Service Manual

Danfoss VLT series
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8-3
VLT is a registered Danfoss trademark
Pin
No.
Schematic
Acronym
Function Description Reading Using a Digital
Volt Meter
1 IU1 Current sensed,
U phase, not
conditioned
Approx 400mv RMS @100% load
.937 VACpeak @ 165%
of CT current rating. AC
waveform @ output
frequency of the drive.
2 IV1 Current sensed,
V phase, not
conditioned
Approx 400mv RMS @100% load
.937 VACpeak @ 165%
of CT current rating. AC
waveform @ output
frequency of the drive.
3 IW1 Current sensed,
W phase, not
conditioned
Approx 400mv RMS @100% load
.937 VACpeak @ 165%
of CT current rating. AC
waveform @ output
frequency of the drive.
4 COMMON Logic common This common is for all signals.
5 AMBT Ambient temp. Used to control FAN high and low fan speeds. 1VDC approximately
equal to 25C
6 FANO Control Card
signal
Signal from Control Card to turn fans on and off. 0VDC – ON command
5VDC – OFF command
7 INRUSH Control Card
signal
Signal from Control Card to start gating SCR front end 5VDC – SCRs disabled
0VDC – SCRs enabled
8 RL1 Control Card
signal
Signal from Control Card to provide status of Relay 01 5VDC – Relay active
0VDC – inactive
9 EXT24V Signal to Control
Card
Signal indicating a backup power supply is active. 5VDC – backup present
0VDC – no backup
10 TEMP_HS Analog signal
inversely
proportional to
HS temp
Will read ~ 3.3 volts if the heat sink NTC is disconnected. As
HS temperature goes up the voltage goes down.
Formula, VDC = 2.82
0.035 * (T – 30), where
T is the temperature in
degrees Celsius.
11 VPOS +18 VDC
regulated supply
+16.5 to 19.5
VDC
Red LED indicates voltage is present between VPOS and
VNEG terminals.
+18 VDC regulated
supply +16.5 to 19.5
VDC
12 VNEG -18 VDC
regulated supply
-16.5 to 19.5
VDC
Red LED indicates voltage is present between VPOS and
VNEG terminals.
-18 VDC regulated
supply
-16.5 to 19.5 VDC

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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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