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AC Power Fail (J10-19)
J10-19 is the inverse of AC Power OK, and goes to a TTL “1” when the input AC power is not OK. It is
capable of sourcing 10mA maximum. The fan out is 20.
Phase Fail (Input Overcurrent) (J10-14)
J10-14 is a TTL level active-high signal that is asserted when the peak input current reaches 30A due
to the loss of an input phase or severe line imbalance. This occurs when one input phase is lost with
approximately 1400W output loading. Maximum current that can be sourced is 10mA.
Overtemperature Warning (J10-3)
J10-3 is a signal that asserts a TTL level "1" if the air temperature exceeds the following factory set
levels. The warning trip point is 65 – 76°C, typically, and recovery point is 60 – 71°C, typically.
Overtemperature Shut Down
If the inlet ambient air temperature exceeds the following factory-set levels, the outputs are disabled.
The shut-down trip point is 70 – 81°C, typically, and recovery point is 40 – 48°C, typically.
Analog Temperature Monitor (J10-4)
This signal on J10-4, referenced to Signal Ground, provides an analog DC voltage output between
0V and 10V that represents the air temperature of 0 – 100°C inside the power supply. The inlet air
temperature is monitored close to the fan.
Gate IN/Gate OUT (J10-13, 25)
The 3-Phase MegaPAC™ and 4kW MegaPAC can be paralleled with other 3-Phase MegaPACs and
4kW MegaPACs respectively to increase output power. The Gate OUT (or PC) pin of the ConverterPAC™
in slot #10 is available on J10-25 and can be used to provide input to the Gate In (or PC) pin of the
ConverterPAC in slot #1 of a different 3-Phase MegaPAC or 4kW MegaPAC. The ConverterPAC in slot
#1 of the second chassis must be a booster and additional boosters can be connected in parallel to it.
The ConverterPAC in slot #10 of the first 3-Phase MegaPAC or the 4kW MegaPAC must be either a
driver or a booster in a parallel array. ConverterPACs paralleled from chassis to chassis must be of the
same type, voltage and power.
The 3-Phase MegaPAC and 4kW MegaPAC are configured at the factory to allow box-to-box paralleling
using the ConverterPACs originally shipped in the chassis. Since the MegaPAC is a field-configurable
supply, the proper configuration must be verified before paralleling from chassis to chassis. The last two
digits of the 4kW MegaPAC part number will identify whether slot #1 and slot #10 were configured for
use with VI-200™ / VI-J00™ or Maxi ConverterPACs.
Using the example of MX7-410108-32, the last two digits, "–32," identify the type of module in slot
#1 and slot #10, respectively. A "3" indicates the chassis is configured to parallel box-to-box using a
Maxi converter. A "2" indicates the chassis is configured to parallel box-to-box using a VI-200 converter.
The above example shows the chassis is configured for a Maxi converter in slot #1 and a VI-200
converter in slot #10.
When connecting multiple chassis in parallel, the signal ground on J10 of each chassis should be
tied together. Chassis outputs should be tied together near the power supply and then cabled to
the load. Using separate cables to provide power to the load will limit the supplies' ability to current
share properly.
