Chapter 3: Using the Web Interface
63
•
They have an ID number as illustrated below.
•
They show one of the managed states. See
•
For managed 'numeric' sensors, their readings are retrieved and displayed. If any numeric sensor is disconnected or its
reading cannot be retrieved, it shows "unavailable" for its reading.
Understanding Unmanaged Sensors/Dry Contacts
Unmanaged sensors/dry contacts:
•
The PDU neither communicates with unmanaged sensors/dry contacts nor retrieves their data.
•
Unmanaged sensors/dry contacts are listed only when they are physically connected to the PDU. They disappear
when they are no longer connected.
•
They do
not
have an ID number.
•
They show the "unmanaged" state.
Sensor/Dry Contact States
An environmental sensor or dry contact shows its real-time state after being managed.
Available sensor states depend on the sensor type -- numeric or state sensors. For example, a contact closure sensor is a
state sensor so it switches between three states only --
unavailable
,
alarmed
and
normal
.
Sensors will be highlighted in yellow or red when they enter abnormal states. See
Yellow- or Red-Highlighted Sensors
(on
page 62).
An dry contact's state is marked in red when it is turned on.
