Technology Guide; Presence & Absence Explained - CP Electronics UNLCDHS Programming Manual

Technology Guide

Presence & Absence Explained
Detection Mode
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 off after an adjustable time period.
Absence
• The load is manually switched on. When the area is no
longer occupied the load will automatically switch off
after 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 flash red when movement is detected.
The choice between presence and absence detection
for different spaces can make a big difference in user-
friendliness and the amount of energy saved.
Manual Timeout
6
Presence Detection: Detectors will switch on lighting automatically
when a person enters the room, and switches off lighting automatically
when no movement is detected.
Absence Detection: Upon entering the room the person switches on
the light as normal, but on leaving the detector switches off the lighting
automatically. Lights can also be switched off manually.
Absence Recovery: After 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.
Manual Timeout (via switch): This ensures that if a switch
is activated and no movement is detected the lights will
switch off after 10 minutes, minimising unnecessary lit space.