Pin
No.
Schemat
ic
Acronym
Function
Description
Reading Using a Digital Voltmeter
17
FAN_ON
Pulse train to gate SCR’s
for fan voltage control.
In sync with line freq.
8.00
6.00
4.00
2.00
0.00 V
-2.00
-4.00
-6.00
-8.00
-4.0ms
2ms/Div
Input A
130BX152.10
7 trigger pulses at 3Khz
5VDC - fans off
18
HI_LOW
Control signal from
Power Card
Signal to switch fan speeds between high and low
+5VDC = fans on high,
Otherwise, 0VDC.
19
SCR_DIS
Control signal for SCR
front end
Indicates SCR front end is enabled or disabled.
0.6 to 0.8 VDC – SCRs enabled
0VDC – SCR disabled
20
INV_DIS
Control signal from
Power Card
Disables IGBT gate voltages
5VDC – inverter disabled
0VDC – inverter enabled
21
Not used
22
UINVEX
Bus Voltage scaled
down
Signal proportional to UDC
OV switch must be off
- 1 VDC = 450 VDC [T4/T5]
- 1 VDC = 610 VDC [T7]
23
VDD
+24 VDC power supply
Yellow LED indicates voltage is present.
+24 VDC regulated supply
+23 to 25 VDC
24
VCC
+5.0 VDC regulated
supply. +4.75-5.25 VDC
The green LED indicates voltage is present.
+5.0 VDC regulated 4.75 to 5.25 VDC
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
@
10Hz
2.2–2.5 VDC
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
@
10Hz
2.2–2.5 VDC
Equal on all phases
TP25-TP30
27
GVP_T
IGBT gate signal,
buffered, V 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
@
10Hz
2.2–2.5 VDC
Equal on all phases
TP25-TP30
28
GVN_T
IGBT gate signal,
buffered, V 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
@
10Hz
2.2–2.5 VDC
Equal on all phases
TP25-TP30
29
GWP_T
IGBT gate signal,
buffered, W 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
@
10Hz
2.2–2.5 VDC
Equal on all phases
TP25-TP30
Special Test Equipment
High Power Service Manual for Modular F Frame Drives
130
MG90K202 - VLT
®
is a registered Danfoss trademark
10
10