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User Manual: WaveLinx Lite (4.0)
Work with Daylight Sets in Networked Areas
Daylight sensor control is achieved through fixture mount, tilemount and integrated sensors for both interior and exterior applications.
WaveLinx Lite (4.0) supports both closed loop and open loop daylighting approaches for devices assigned to dimmable zones.
For outdoor applications, the focus is typically on ensuring that the fixtures turn OFF at dawn and turn ON or enable motion activity to turn ON
lighting at dusk. For indoor applications, the focus is typically on trying to maintain a consistent light level by adjusting the amount of electric
light needed based on the amount of daylight present in the space.
In both scenarios, the daylighting functionality may be disabled for fixtures that are not located in daylight zones or for any devices where
daylight operation is not desired.
Daylighting filters or inhibits the fixture's response to other control commands. A command from a wallstation button or occupancy sensor to
go to 100% level will adjust the electric light level output to meet the calibrated daylight level (calibrated light level = 100%). A command from a
wallstation button or occupancy sensor to go to 50% will adjust the electric light level to meet 50% of the calibrated daylight level. The actual
electric light level output with these commands will vary based on the available amount of daylight and how much electric light needs to be
contributed to maintain the commanded target. If the electric light has daylight dimmed to OFF, lighting will remain OFF if occupancy or
wallstation commands are received, preventing unnecessary energy waste when adequate daylight is present.
For information on how a specific device operates with dimming and dim-to-off response, refer to "WaveLinx Lite Device Reference Sheets"
beginning on page 9 to locate the specific daylight response by device type.
• Closed Loop Daylighting: With the closed loop approach, the sensor controls only its connected light fixture. A closed loop sensor reads
the reflected light level from the surface directly below it including light contributed by the electric light and the daylight that falls within the
sensor's view. As daylight contribution increases, the sensor dims the electric light to keep the light level on the surface as consistent as
possible. If bright daylight causes the surface light level to be above the desired level even after the light level has been fully dimmed, after
a period the fixture will dim to OFF.
then raise the amount of electric light accordingly.
• Open Loop Daylighting: Fixture mount, tilemount, and integrated sensors that have up-to-date firmware provided with WaveLinx Lite 4.0
will allow a selected sensor to provide open loop daylight control. WaveLinx Lite's auto calibrate technology allows the sensor to
differentiate between the fixture's electric light and contributed daylight. A correlation is then made between the level of the contributed
daylight and the desired electric light level output, adjusting how much the sensor dims the electric light in response to daylight (adjusting
the gain). The sensor adjusts the electric lighting as daylight contribution increases and decreases including dim to OFF if enough daylight
is present.
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Modify Closed Loop Daylight Control
This section focusses on the use of closed loop sensor control for fixture mounted, tilemount and integrated sensors that are provisioned to a
dimmable zone.
This includes details on how to:
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• Identify the daylight set being used for a specific device
• Enable/disable daylighting for specific sensors
• Use auto calibration for closed loop sensors
• Manually calibrate closed loop sensors
• Test daylight sensor operation
Internet connection is not needed but connection to the WaveLinx Lite device/network is required. The mobile device will need to be in range
and as close as possible (within 60 feet) to one of the line voltage powered WaveLinx Lite devices that belongs to the same area.
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Devices provisioned in non-dimmable or receptacle zones will not allow daylight control.
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If the device allows dim-to-off, when the measured light level exceeds 150% of the calibrated light level for more than 30 minutes, the sensor will turn lighting OFF. Lighting
will be turned back ON when one of the two conditions occurs. Condition 1: The measured light level falls between 100% and 50% of the calibrated light level for more than
10 minutes. Condition 2: The measured light level falls below 50% of the calibrated light level for longer than 30 seconds.
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When the measured light exceeds 150% of the calibrated gain for more than 30 minutes, the sensor will turn lighting OFF. Lighting will be turned back ON when one of the
two conditions occurs. Condition 1: The measured light level falls between 100% and 50% of the calibrated gain for longer than 10 minutes. Condition 2: The measured light
level falls below 50% of the calibrated gain for longer than 30 seconds.
As daylight contribution decreases and the surface light level lowers, the fixture will turn back ON and
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