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Primary Input Active
Secondary Input Active
20
Configuration and Operation
After installing the PDU and connecting
equipment, you may test the Automatic
Transfer Switch function by temporarily
shutting down the UPS system connected
to the Primary AC input. When the
Primary input UPS is no longer supplying
AC power, the PDU will switch from the
Primary input to the Secondary input,
and the Secondary Active Input LED will
be lit. When the Primary input UPS has
been restarted and resumes supplying
AC power, the PDU will switch back to the
Primary input, and the Primary Active
Input LED will be lit.
Note: The primary and secondary inputs must be
connected to separate sources of utility power. The
automatic transfer switch function will be
compromised if the primary and secondary inputs
are connected to the same utility power source. Do
not perform a test with equipment that must remain
in productive operation. Any test procedure must
prepare for the contingency that the equipment may
lose power. Do not test the PDU by detaching power
cords connected to live power sources, as this
eliminates the connection to ground and places your
equipment at risk.
PDUMH30ATNET Model Shown
PDU Power Source Selection Parameters
PDUMH30AT,
PDUMNH30AT2 &
PDUMH30ATNET
PDUMH30HVAT, PDUMNH30HVAT2
PDUMH30HVATNET, PDUMH32HVAT,
PDUMNH32HVAT2 & PDUMH32HVATNET
Nominal Voltage 120V 200-240V
Minimum Startup Voltage 85V 163V
“Good” Voltage Range 99-139V 172-266V
“Fair” Voltage Range 75-98V 144-171V
“Bad” Voltage Range 0-74V 0-143V
Configuration and Operation
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