GE AF-650 GP Operating Instructions Manual page 132

Pin No. Schematic Function
Acronym
1 IU1 Current sensed,
U phase, not condi-
tioned
2 IV1 Current sensed,
V phase, not conditioned
3 IW1 Current sensed,
W phase, not condi-
tioned
4 COMMON Logic common
5 AMBT Ambient temp.
6 FANO Control Card signal
7 INRUSH Control Card signal
8 RL1 Control Card signal
9 Not used
10 Not used
11 VPOS +18 VDC regulated sup-
ply +16.5 to 19.5 VDC
12 VNEG -18 VDC regulated sup-
ply
-16.5 to 19.5 VDC
13 DBGATE Brake IGBT gate pulse
train
14 BRT_ON Brake IGBT 5V logic level
signal.
15 Not used
16 FAN_TST Control signal for fans
17 FAN_ON Pulse train to gate SCR's
for fan voltage control.
In sync with line freq.
Description
Approx 400 mv RMS @100% load
Approx 400 mv RMS @100% load
Approx 400 mv RMS @100% load
This common is for all signals.
Used to control FAN high and low fan speeds.
Signal from the control card to turn the fans on and off. 0 VDC – ON command
Signal from the control card to start gating the SCR
front end
Signal from Control Card to provide status of Relay 01 0 VDC – Relay active
The red LED indicates voltage is present between VPOS
and VNEG terminals.
The red LED indicates voltage is present between VPOS
and VNEG terminals.
Varies w/ brake duty cycle
Varies w/ brake duty cycle
Indicates Fan Test switch is activated to force the fans
on high
7 trigger pulses at 3Khz
High Power Service Manual for Unit Sizes 6x
Reading Using a Digital Voltmeter
.937 VACpeak @ 165% of CT current rating. AC
waveform @ output frequency of the frequency
converter.
.937 VACpeak @ 165% of CT current rating. AC
waveform @ output frequency of the frequency
converter.
.937 VACpeak @ 165% of CT current rating. AC
waveform @ output frequency of the frequency
converter.
1 VDC approximately equal to 25C
5 VDC – OFF command
3.3 VDC – SCRs disabled
0 VDC – SCRs enabled
0.7 VDC – inactive
+18 VDC regulated supply +16.5 to 19.5 VDC
-18 VDC regulated supply
-16.5 to 19.5 VDC
Voltage drops to zero when brake is turned off. Volt-
age increases to 4.04 VDC as brake duty cycle rea-
ches max.
5.10 VDC level with the brake turned off. Voltage
decreases to zero as brake duty cycle reaches max.
+5VDC – disabled
0VDC – fans on high
5VDC - fans off
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