CP Electronics UNLCDHS - Introduction; Technology Guide; Presence & Absence Explained

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Presence Detection: Detectors will switch on lighting automatically
when a person enters the room, and switches o lighting automatically
when no movement is detected.
Absence Recovery: Aer an occupancy time out period has elapsed
in absence mode, the unit temporarily enters a presence mode for 10
seconds allowing the occupants movement to bring the lights back on.
Absence Detection: Upon entering the room the person switches on
the light as normal, but on leaving the detector switches o the lighting
automatically. Lights can also be switched o manually.
Manual Timeout (via switch): This ensures that if a switch
is activated and no movement is detected the lights will
switch o aer 10 minutes, minimising unnecessary lit space.
The Detection Mode for both output Channels 1 and 2 can
be set to behave in Presence or Absence mode:
Presence
• When movement is detected the load will automatically
turn on. When the area is no longer occupied the load will
automatically switch o aer an adjustable time period.
Absence
• The load is manually switched on. When the area is no
longer occupied the load will automatically switch o
aer the adjustable time period has elapsed.
In either case, sensitivity to movement of the PIR sensor
can be adjusted using the Sensitivity parameter.
HINT: To assist in setting the sensitivity, turn on the Walk
Test LED which will ash red when movement is detected.
The choice between presence and absence detection
for dierent spaces can make a big dierence in user-
friendliness and the amount of energy saved.
Technology Guide
Presence & Absence Explained
Detection Mode
Manual Timeout