Danfoss VLT FC 100 Service Manual page 125

Special Test Equipment
Pin Schematic Function
No. acronym
19 Not used
20 INV_DIS Control signal
from Power Card
21 Not used
22 UINVEX Bus Voltage
scaled down
23 VDD (+) 24 V DC
power supply
24 VCC (+) 5.0 V DC
regulated supply.
(+) 4.75 to 5.25 V
DC
25 GUP_T IGBT gate signal,
buffered, U phase,
positive. Signal
originates on the
control card.
26 GUN_T IGBT gate signal,
buffered, U phase,
negative. Signal
originates on
control card.
27 GVP_T IGBT gate signal,
buffered, V phase,
positive. Signal
originates on
control card.
MG94A222
Service Manual
Description
Disables IGBT gate voltages
Signal proportional to UDC
Yellow LED indicates voltage is present.
The green LED indicates voltage is present.
Input A
8.00
6.00
4.00
2.00
0.00 V
-2.00
-4.00
-6.00
-8.00
-4.0ms 50Us/Div
2v/div 100us/div Run@10 Hz
Input A
8.00
6.00
4.00
2.00
0.00 V
-2.00
-4.00
-6.00
-8.00
-4.0ms 50Us/Div
2v/div 100us/div Run@10 Hz
Input A
8.00
6.00
4.00
2.00
0.00 V
-2.00
-4.00
-6.00
-8.00
-4.0ms 50Us/Div
2v/div 100us/div Run@10 Hz
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
Reading using a
digital voltmeter
5 V DC – inverter
disabled 0 V DC –
inverter enabled
0 V switch must be
off
(-) 1 V DC =250 V DC
(+) 24 V DC regulated
supply (+) 23 to 25 V
DC
(+) 5.0 V DC
regulated supply (+)
4.75 to 5.25 V DC
2.2–2.5 V DC
Equal on all phases
8
TP25-TP30
2.2–2.5 V DC
Equal on all phases
TP25-TP30
2.2–2.5 V DC
Equal on all phases
TP25-TP30
123
8