Page 33 - PHU_User Manual_EN_Rev A

GETTING STARTED

PHU 1500-20 (0.00 to 75.00) Ω
PHU 1500-30 (0.000 to 50.000) Ω

Alarms

The PHU power supplies have a number of protection features.
When one of the protection alarms is tripped, the ALM icon on the
display will be lit and the type of alarm that has been tripped will be
shown on the display. When an alarm has been tripped the output
will be automatically turned off. For details on how to clear an alarm
or to set the protection modes, please see page 58.

OVP Over voltage protection (OVP) prevents a high
voltage from damaging the load. This alarm can
be set by the user.

OCP Over current protection prevents high current
from damaging the load. This alarm can be set by
the user.
OPP Over power protection prevents high power from
damaging the load. This alarm can be set by the
user.

PUF Power Unit Fail. This alarm function is activated
when a Power Unit is detected, Including over
temperature protection.
SENSE Sense alarm. This alarm will detect if the sense
wires have been connected to the wrong polarity.
AC FAIL AC Fail. This alarm function is activated when a
low AC input is detected.
Shutdown Force Shutdown is not activated as a result of the
PHU series detecting an error. It is a function that
is used to turn the output off through the
application of a signal from the rear panel analog
control connector when an abnormal condition
occurs.

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