
2
Light channel A
Switching response is controlled by presence and brightness.
The switch contact closes during darkness and when some-
one is present. It opens with a delay when there is brightness
or when no one is present.
Time delay
The time delay enables delayed switching off of lighting after
the room is vacated. The time delay is adjustable in a range
of 10 s to 60 min. If someone goes into an unoccupied room
only briey and leaves it within 30 seconds, then the light
shuts off prematurely after 2 minutes (short-term presence).
Push button control
The lighting can be manually switched at any time via a
push button or switch. If the light is switched on manually, it
will remain on for at least 30 minutes providing people are
present. It then switches off when the brightness is adequate.
The light is forced off after a preset time delay if the room
was (previously) vacated. If articial lighting is switched off
manually. the lighting remains switched off as long as the
room is occupied. The lighting switches again automatically
after the time delay has expired.
Fully or semi-automatic
Lighting control via the presence detector operates fully
automatically for increased comfort or semi-automatically for
greater energy savings. In „fully automatic“ the lights switch
on and off automatically. Light switching has to be completed
manually in „semi-automatic mode“. The lighting is always
switched off automatically.
Pulse function
Time delay can be set to pulse for controlling existing stair-
case light timer switch. The light output produces a pulse of
0.5 seconds duration every 10 seconds if people are present
or it is dark.
Channel presence H
Channel presence H is used for HVAC control. The switching
response of the oating contact is inuenced only by pre-
sence and not by brightness. If the contact is closed, the time
delay will be restarted at every movement. The contact is not
inuenced by the push button or switch.
Switch-on delay
The switch-on delay prevents instantaneous switch on. The
contact closes only on expiry of the switch-on delay, providing
people are constantly present.
Time delay
The time delay enables delayed switching off of HVAC devices
and systems after the room is vacated.
5. Detection area
The circular detection area of theRonda presence detector
covers a large detection area, and permits a complete room
coverage with many applications. Note that seated and
moving persons can be detected in differently-sized areas.
The recommended installation height is 2.0 m – 6.0 m. As
installation height increases, the sensitivity of the presence
detector decreases. Walking motions are necessary from ins-
tallation heights of 3.5 m and the detection areas of several
detectors should overlap in the marginal zones. The detection
range is reduced as temperatures increase.
Seated persons:
The details relate to smallest movements at table height
(approx. 0.80 m).
Moving persons:
At installation heights of between 5 and 10 m, the extent and
distance between the active and passive zones increase.
Installation
height (A)
Moving persons
Frontal (r)
Moving persons
Across (t)
Seated persons:
(s)
2,0 m 28 m2Ø 6 m 380 m2Ø 22 m 16 m2Ø 4,5 m
2,5 m 38 m2Ø 7 m 415 m2Ø 23 m 24 m2Ø 5,5 m
3,0 m 50 m2Ø 8 m 452 m2Ø 24 m 28 m2Ø 6 m
3,5 m 50 m2Ø 8 m 452 m2Ø 24 m 38 m2Ø 7 m
4,0 m 50 m2Ø 8 m 452 m2Ø 24 m – –
5,0 m 50 m2Ø 8 m 452 m2Ø 24 m – –
6,0 m 50 m2Ø 8 m 452 m2Ø 24 m – –
10,0 m 50 m2Ø 8 m 491 m2Ø 25 m – –
All gures are guidance values.
Brightness measurement
The presence detector measures articial light and daylight
that is reected directly below the detector. The light mea-
surement area maps a rectangle of about 2 x 3.5 m at table
height. The installation location is a reference point for the
lighting level. Direct light inuences the light measurement.
Avoid placing oor lamps or suspended lighting directly below
the detector. If the brightness measurement is deactivated,
the light channel A only switches depending on the presence
(brightness switching value set to „on“ via potentiometer or
set to „measurement off“ via the remote control).
Innen 2 m Fenster
Suitable lamps
The presence detector is designed for the operation of uo-
rescent lamps, compact uorescent lamps, halogen/incande-
scent lamps and LEDs. The maximum number of switchable
lights is restricted due to the high inrush current levels of
the EBs and LED drivers. The use of an external contactor