Pin
No.
Schematic
acronym
Function
Description
Reading using a
digital voltmeter
11
VPOS
(+)18 V DC
regulated supply
(+)16.5 to 19.5 V
DC
The red LED indicates that voltage is present between VPOS and VNEG
terminals.
(+)18 V DC regulated
supply (+)16.5–19.5 V
DC
12
VNEG
(-)18 V DC
regulated supply
(-)16.5 to 19.5 V
DC
The red LED indicates that voltage is present between VPOS and VNEG
terminals.
(-)18 V DC regulated
supply
(-)16.5–19.5 V DC
13
Not used
14
Not used
15
Not used
16
Not used
17
Not used
18
Not used
19
Not used
20
INV_DIS
Control signal
from power card
Disables IGBT gate voltages.
5 V DC – inverter
disabled
0 V DC – inverter
enabled
21
Not used
22
UINVEX
Bus voltage scaled
down
Signal proportional to UDC.
0 V switch must be
off
(-)1 V DC=250 V DC
23
VDD
(+) 24 V DC
power supply
Yellow LED indicates that voltage is present.
(+)24 V DC regulated
supply
(+)23–25 V DC
24
VCC
(+) 5.0 V DC
regulated supply.
(+) 4.75 to 5.25
VDC
The green LED indicates that voltage is present.
(+)5.0 V DC regulated
supply (+)4.75–5.25 V
DC
25
GUP_T
IGBT gate signal,
buffered, U phase,
positive. Signal
originates on
control card.
8.00
6.00
4.00
2.00
0.00 V
-2.00
-4.00
-6.00
-8.00
-4.0ms
50Us/Div
Input A
130BX153.10
2v/div 100us/div Run at 10 Hz
2.2–2.5 V DC
Equal on all phases
TP25–TP30
26
GUN_T
IGBT gate signal,
buffered, U phase,
negative. Signal
originates on
control card.
8.00
6.00
4.00
2.00
0.00 V
-2.00
-4.00
-6.00
-8.00
-4.0ms
50Us/Div
Input A
130BX153.10
2v/div 100us/div Run at 10 Hz
2.2–2.5 V DC
Equal on all phases
TP25–TP30
Special Test Equipment
Service Guide
MG94A502
Danfoss A/S © 02/2019 All rights reserved.
127
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Содержание VLT FC Series
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