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Interface Connections
Chassis Input Power Terminals (J1)
Input AC power is applied to a plug-in connector, J1, that accepts soldered terminals with a wire size of
12AWG. For operation on high-voltage DC input, input power can be connected to any two input lines.
A fault-clearing device should be installed at the input of the unit. A user-accessible input fuse is not
present within the unit. For an output of 2,000 – 4,000W with operation on 208V
AC
, three-phase input,
a 20A fuse in each input line is acceptable. Input power cables should be shielded to minimize radiated
noise effects.
Output Power Connections (+P, –P for Single Output, or J1A/J1B for Dual Outputs)
For single output ConverterPACs™, these terminals are two 1/4-20 plated steel studs. The upper stud
is positive with respect to the lower stud. For dual output ConverterPACs, there is a six-pin Molex
connector for each output. J1A pins 1 and 4 are the +Output, and J1A pins 2 and 5 are the –Output.
Pins 3 and 6 are duplicates of the Remote Sense terminals present on J1B. Use appropriate wire size
rated to handle the full output current, including short circuit levels. Avoid large current loops in output
cables; run power and return cables next to one another to minimize inductive effects. All outputs are
isolated and can provide positive or negative outputs.
/–SENSE Connections (J2 for Single Output, or J1A/J1B for Dual Outputs)
Newer power supplies may have some outputs configured with the Autosense feature that automatically
locally senses the output if remote sense is not used. To check if an output has the Autosense feature,
measure the impedance from the +OUT to +SENSE and –OUT to –SENSE pins. If the impedance is 5Ω,
then the output has Autosense and does not require local-sense jumpers.
For units without Autosense, sense connections must be made. When making sense connections,
keep in mind that although all outputs are open-sense protected, the +/–SENSE terminals MUST be
connected to their respective outputs before the 3-Phase MegaPAC™ or 4kW MegaPAC is powered
up. Regardless of the output polarity configured, the +SENSE should always connect to the +Power
output. The –SENSE connects to the –Power output. Sense connections are not required on booster
ConverterPACs, BatPACs™ or if the local-sense option is specified.
J1-4 Earth Ground
J1-1 Line 3
J1-2 Line 2
J1-3 Line 1
J1
Figure 3
Input panel connector
