Sensor View Shield; Light Sensor; Led Indicator; Ir Receiver - Philips EasySense Design Manual

• Occupancy view shield
Figure 2. Sensor view shield.

Sensor view shield

The sensor comes with an occupancy view shield
that can be used to block the movement detection
by the sensor in a certain area. The shield comes
inverted. (See Figure 2.) This view shield can be
pulled out, flipped and inserted back in the sensor
and then rotated so the correct area is shielded off
from the detection area. If such shield is not needed
in the application, it can be easily pulled out from
the sensor or left inverted.

Light sensor

The light sensor is a photo diode that reads average
light level captured under an angle of approximately
40°. The intensity of the illuminance depends on the
amount of artificial and/or natural light supplied in the
office, as well as how this light is reflected toward the
ceiling/sensor. The EasySense converts the illumi-
nance signal into ON/OFF or dimming commands to
the Xitanium SR driver in order to maintain a constant
light level on the desk. The sensor should be installed
with a minimum distance of 0.6 m to the window to
avoid the sensor looking outside. When the sensor is
mounted too close to the window it will look partly
outside. Sun reflection from cars or snow can reflect
directly into the sensor.
Window
h
Windowsill
eld of view
(= 0.7 x h)
May 2016
Photocell
Figure 3.
Sensor
placement.
The sensor will then measure such high illumination
levels that it will drive the artificial light to its minimal
level or even switch off the artificial lights. The
optimum distance [Y] from the window to EasySense
can be obtained from Figure 4. This graph shows the
relation between the distance from the window to
the sensor [Y] and the height [H] of the sensor
(H, height of the sensor measured from ceiling to
bottom of window sill).

LED indicator

The product contains an LED indicator. The LED
indicator by default is enabled, and it can be disab-
led through the app. The behavior of the LED is as
listed below.
Yellow LED on: = vacancy & sensor is functional.
Red LED on: = motion is detected and hold time is
not expired yet.

IR receiver

The infrared receiver serves as a communication
portal for the commissioning tools for future version
of the sensor. Also, an RF transceiver is built in, in
compliance with RTTE and EMC regulation, and will
be enabled for future version of the sensor.
Y (cm) Field of view
230
210
190
170
150
130
110
90
70
50
100 120 140 160 180 200 220 240 260 280
Design-in Guide - Philips EasySense luminaire-mount sensors
Figure 4.
Sensor mounting
height from window
sill (Y) vs. sensor
horizontal distance
from window sill (H).
H (cm)
7