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120 Legrand PDU User Guide
Note: Per default you can turn on as many dry contact actuators as possible, but only one "powered dry
contact" actuator can be turned on at the same time. To change this limitation of "powered dry contact"
actuators, modify the active powered dry contact setting. See
PDU
(on page 94).
3. Confirm the operation when prompted.
Tip: If intending to control the actuator via the front panel, see
Front Panel Settings
(on page 224).
Yellow- or Red-Highlighted Sensors
The Legrand PDU highlights those sensors that enter the abnormal state with a yellow or red color. Note that
numeric sensors can change colors only after you have enabled their thresholds.
Tip: When an actuator is turned ON, it is also highlighted in red for drawing attention.
For concepts of thresholds, deassertion hysteresis and assertion timeout, see
Sensor Threshold Settings
(on page 473).
In the following table, "R" represents any numeric sensor's reading. The symbol <= means "smaller than" or
"equal to."
Sensor
status
Color
States shown in
the interface
Description
unavailable Sensor
state
or
readings cannot be detected.
Unknown
unmanaged Sensors
are
not being managed. See
Managed vs
Unmanaged Sensors/Actuators
(on page 121).
Normal
normal
Numeric or state sensors are within the normal range.
-- OR --
No thresholds have been enabled for numeric sensors.
above upper
warning
Upper Warning threshold < "R" <= Upper Critical threshold
Warning
below lower
warning
Lower Critical threshold <= "R" < Lower Warning threshold
above upper
critical
Upper Critical threshold < "R"
Critical
below lower
critical
"R" < Lower Critical threshold
Alarmed
alarmed
State sensors enter the abnormal state.
OCP alarm
Open
Circuit breaker trips.
-- OR --
Fuse
blown.