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Configuring and Reconfiguring MegaPACs™
ConverterPACs
™
can be easily added, replaced or moved by sliding the assemblies in or out of a
MegaPAC chassis. Most ConverterPACs are Driver ModuPACs
™
and can be inserted into any available
slot. For outputs greater than 200 watts, a Driver ModuPAC and one or more Booster ModuPACs will
be used. Arrays of Drivers and Boosters should be configured so all Boosters are placed in the slots to
the immediate right of the Driver when looking at the output end of the MegaPAC.
Prior to removing or installing ConverterPACs, you must remove power from the MegaPAC
and wait five minutes. Failure to do so can result in personal injury or damage to the supply.
Take standard ESD precautions when handling ConverterPACs.
Removing ConverterPACs
ConverterPACs can be removed by loosening the captive screw at the base. Once this screw has been
loosened, the ConverterPAC will slide out of the chassis. Once a ConverterPAC has been removed, the
empty slot MUST be filled with either another ConverterPAC or an airblock. If the slot is left empty, it
will provide an airflow escape, significantly degrade thermal performance and can cause failure.
ConverterPAC Feature Summary
ConverterPAC
OVP
OCP
OTP
RS
LS
PG
TrimPot
ModuPAC
™
Std
Std
Std
Std
Opt
Opt
Opt
DualPAC
™
N/A
Std
N/A
Std
Opt
N/A
Opt
JuniorPAC
™
N/A
Std
N/A
Std
Opt
Opt
Opt
RamPAC
™
N/A
Std
N/A
Std
Opt
Opt
Opt
OVP
Overvoltage Protection (latching)
OCP
Overcurrent Protection (auto-recovery)
OTP
Overtemperature Limiting (latching)
RS
Remote Sense
PG
Power Good (DC OK)
LS
Local Sense
Installing ConverterPACs as Drivers
ConverterPACs can be installed in empty slots by simply sliding in the new ConverterPAC and securing
the screw at the base. Power and interface connections can be made after the ConverterPAC has
been installed.
Installing Booster ModuPACs to Increase Output Power
ConverterPACs can be paralleled for more power. Additional power to an output is obtained by
connecting one or more Boosters in parallel with a single driver. The driver can be placed in any open
slot. All Boosters should be inserted in the slots to the immediate right of the driver as viewed from
the output end of the MegaPAC. Figure 2 shows a Driver placed in slot #1 and three Boosters placed
in slot numbers 2 – 4. After inserting the Driver and Boosters, they are paralleled using bus bars across
the positive and negative output studs. Drivers should not be paralleled with each other. For help in
identifying Boosters and Drivers, refer to the section on MegaPAC Part Numbers.
Figure 2
Paralleling ConverterPACs
Bus Bars for Paralleling
Loosen screw to
remove ConverterPAC
Driver
Boosters
1
2
3
4
5
6
7
8
