UG:123
Page 4
An output Enable/Disable function is provided by using an optocoupler to control the gate In pins of
the ConverterPAC
™
assemblies. If the Enable/Disable control pin is pulled low, the optocoupler turns
on, pulling the gate IN pin low and disabling the ConverterPAC output. The nominal delay associated
for an output to come up when measured from release of the Enable/Disable pin is 5 – 10ms. The
General Shutdown function controls all outputs simultaneously and works in a similar manner. If driven
from an electromechanical switch or relay, a capacitor should be connected to eliminate the effects
of switch bounce.
There is no ride-through (hold up) time available with the DC MegaPAC
™
.
Figure 1
DC MegaPAC Architecture
EMI Filter
Under, Over & Reverse,
Voltage Protection,
Inrush Current Limiting
Logic Power
Supply
Housekeeping
Circuits
DC
Fan
DC Bus Sense
Customer Interface
(Opto-isolators)
Power
Input
ConverterPAC #1
ConverterPAC #2
ConverterPAC #3
Power
Output
ConverterPAC #5
Control
ConverterPAC #4
Under, Over &
Reverse Voltage
Control
Power
Output
Power
Output
Power
Output
Power
Output
ConverterPAC #6
ConverterPAC #8
ConverterPAC #7
Power
Output
Power
Output
Power
Output
