Specifications

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MegaPAC Mechanical Considerations (cont)
Avoid excessive bending of output power cables after they are connected to the MegaPAC.
For high-current outputs, use cable-ties to support heavy cables to minimize mechanical stress
on output studs. Be careful to not short-out to neighboring output studs. The MegaPAC is
supplied with serrated, flanged hex-nuts on all output studs, therefore, Loc-tite® or lock
washers are not required. The maximum torque recommended on flanged nuts is 45 in.-lbs.
Avoid applications in which the unit is exposed to excessive shock or vibration levels. In such
applications, a shock absorption mounting design is required.
MegaPAC Do’s and Don’ts
• Do not leave ConverterPAC sense line open. Always terminate them locally or at the
load. Use twisted pair 20-22 AWG wire.
• Insert proper fault protection at power supply input terminals (i.e., a fuse).
• Use proper size wires to minimize voltage drop.
• Always fill all output slots of the MegaPAC. If a slot is not filled with a ConverterPAC it
should be filled with an Airblock. Failure to do so may result in overheating and damage
to the power supply.
• Never loosen the inner nut on a ConverterPAC.
• Do not unplug ConverterPAC while input power is applied. They are not designed for
hot plug applications.
• Do not restrict airflow to the unit. The cooling fan draws air into the unit and forces it
out of the output power terminals.
• For power expansion use booster ModuPACs. Viewing the unit from the output
terminal side, always insert boosters to the right of the driver.
• Run the output power cables next to each other to minimize inductance.
• Wait 5 minutes after shutting off power to insert or remove ConverterPACs.
• Do not attempt to repair or modify the power supply in any manner other than the
exchange of ConverterPACs as described.
Applications Manual