OVERVIEW
Low Voltage SmartDIM Daylight Sensor
BPD-502 series
INSTALLATION INSTRUCTIONS
INSTALLATION NOTES
Care must be taken when selecting the mounting location
of sensor. The ambient light level may vary greatly at
different measure points in the room, depending on the
location of the windows, lighting fixtures, wall colors, floor
material, desk top, etc.
Note the path of shadows which may affect the sensor
operation. Daylighting control may be problematic if part
of controlled area is in shadows while other part has
plentiful daylight.
The sensor is designed to measure ambient light level by
looking down from ceiling height. Sensing performance
will vary if sensor is mounted to look out from wall. Avoid
installing the sensor to directly look into the skylight, the
daylight level could easily exceed the maximum threshold
of sensor.
The ambient light level on the ceiling can be much lower
than that at the windows, corners of the room, or
especially the workplace level. Therefore, it is important to
set the optimum SmartDIM range based on the lighting
level measured over the workplace.
Avoid placing the sensor at position that will receive strong
light directly, such as within the lighting range of a
pendent light with upward lamp.
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The BPD-502 series member of the TRANS family is a low
voltage daylight sensor designed for automatic daylighting
control. This sensor is capable of maintaining the ambient light
level within a preset range via continuous dimming the
connected lights based on the daylight available in the space.
For the spaces with minor daylight, the sensor can also be used
to provide energy efficient automatic dimming control, thus
prevents energy waste from over lighting.
This daylight sensor employs a cutting edge digital ambient light
sensor (ALS) with an advanced SmartDIM control algorithm
developed by IR-TEC to provide a closed loop, continuous
dimming lighting control for achieving the energy efficiency
required by today’s sustainable buildings. When daylighting
level increases/decreases, the sensor will fade down/ramp up
the connected lights in a smooth way to maintain the combined
ambient light level within the preset range. The sensor will open
its isolated dry contact to shut off the lights if ambient light level
exceeds the shut-off threshold to maximize energy saving.
Like all sensors in the TRANS family, the BPD-502 series is also
available in various mounting options. This feature offers a
second-to-none design and installation flexibility for daylight
harvesting and control applications in sustainable buildings.
The BPD-502 series daylight sensor can be applied to
control the lights of areas that receive sufficient daylight,
thus the electric lights can be reduced or switched OFF
based on the daylight available in the space. Ensure that
the sensor will not receive strong light directly.
If the primary daylight source is a window, the daylight
sensor is typically mounted between the window and the
first row of fixtures.
Side-lighting area
If the primary daylight source is a skylight, the daylight
sensor should be mounted on the ceiling between the
skylight and fixtures, looking down at the floor.
Top-lighting area
SELECTING A LOCATION
AVERTISSEMENT & PRUDENCE
BPD-502
Ceiling
Light Fixture
Window
80°
Peak
Sensitivity
Typical Daylit Zone, about 12’ (3.6m)
Coupez l'alimentation au disjoncteur avant d'installer Power
Pack ou capteurs.
Ne pas installer ou couvrir une boîte de jonction ayant les classes 1
et 3 ou circuits de puissance et d'éclairage.
Classe 2 Câblage de périphériques Seulement - Ne PAS reclasser et
installer Classe 1, 3 ou alimentation et circuits d'éclairage.
Turn power OFF at circuit breaker before installing Power Pack
or Sensors.
Do Not Install To and/or Cover a Junction Box Having Class 1, 3 or
Power and Lighting Circuits
Class 2 Device Wiring Only – Do Not Reclassify and Install as Class
1, 3 or Power and Lighting Wiring
WARNING & CAUTION
P/N: 058-50200-004
Printed in Taiwan
www.irtec.com
This product may be covered by one or more U.S. patents or patent applications.
Please visit www.irtec.com for more information.
INDOOR USE ONLY
Utilisation a L'interieur Uniquement
BPD-502
Light Fixture
Skylight
80°
Ceiling
