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Primary Input
Secondary Input
Unswitched
Outlets
PDUMH20AT,
PDUMH20ATNET
PDUMH20HVAT,
PDUMH20HVATNET
PDUMH15HVAT,
PDUMH15HVATNET
PDUMH15AT,
PDUMH15ATNET
2.2.3
A
5
2. Installation
B
B
B
A
A
2.2.3 Connect PDU Input Plugs:
(See the Configuration and Operation section for more information.) Connect the Primary input
plug
A
to a preferred source of grounded 120V/230V AC power, such as a SmartOnline
®
UPS
System. The UPS system must not share a circuit with a heavy electrical load (such as an air
conditioner or refrigerator). Under normal operating conditions, the PDU will distribute AC power
from the Primary input source. Connect the Secondary input plug
B
to an alternative source of
grounded 120V/230V AC power, such as a redundant SmartOnline UPS System. Do not plug the
Secondary input into the same power source as the Primary input. The PDU will distribute AC power
from the Secondary input only if the Primary input becomes unavailable.
Note: Immediately after the PDU is connected to live AC power, you may notice a series of soft clicking sounds
emitted by electrical relays within the PDU. The relays may also click occasionally during the operation of the
PDU. This is normal.
21-03-429-933721.indb 521-03-429-933721.indb 5 4/5/2021 3:45:34 PM4/5/2021 3:45:34 PM
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