Philips OccuSwitch DALI LRM2070 User Manual page 22

OccuSwitch DALI
User Guide
Page 22
360°
Figure 8: Shielding the movement detection range
For applications where little movement is made, like an
office application, the number of movement detection
sensors must be calculated by dividing the total area
of the room in parts of 4 by 5 meter . In the center of
each of these parts, one OccuSwitch DALI or extension
sensor must be placed . For choosing whether to use
multiple OccuSwitch DALI or to use one OccuSwitch DALI
with extension sensors, see section 3 .2 "Selecting the
OccuSwitch DALI type" on page 23 .
For applications where larger movements are made, like a
corridor or a central hall, the outer detection area can also
be used, so the total area can be divided in parts of 6 by 8
meters .
D Note
To ensure reliable movement detection, all of the
applicable space must be covered by the detection
area of either an OccuSwitch DALI or an extension
sensor . Therefore, for calculating the rough number of
OccuSwitch DALI or extension sensors, the resulting
number of dividing the total area by the sensor
detection area must be rounded up towards the next
whole number .
E Tip
When placing the designed position of the OccuSwitch
DALI or extension sensor in an installation drawing,
note the direction of the detection area . The
OccuSwitch DALI or extension sensor must be placed
according to this direction . To do this alignment, the
"Philips" wordmark and the sensor line-up can be
used .
Light sensing
At a ceiling height of 3 meter, the light sensing area of the
OccuSwitch DALI is a square area of 4 .5 x 4 .5 meter .
The OccuSwitch DALI should be installed in such a way
that the daylight sensor is positioned not too close to
the window . If the sensor is mounted too close to the
window, sunlight reflections from the windowsill or objects
outside (for example snow or a car) can enter directly into
the sensor, making the OccuSwitch DALI regulate on an
incorrect light level .
E Tip
The light sensing area of the OccuSwitch DALI is
usually correct when the movement detection area
does not extend outside any window .
min. 0.75 x h
h
lux
1.5 x h
Figure 9: Light detection range and position
h = max. 3.5 m
1.5 x h