Daylight Harvesting Applications; Daylighting Control Override; Closed Loop Control - ETC Echoflex ELED2-BU Configuration Manual

Daylight Harvesting Applications

The controller modulates light intensity from a dimming fixture based on the ambient light
level in the space when a photo sensor is linked to the dimming channel. When daylighting is
active, a switch, gateway command, or occupancy sensor cannot force the light level higher.
However, a switch, occupancy sensor, or gateway command can override the light OFF or dim
to a level below the daylighting control value.
Note:
Echoflex recommends that only one be linked to the controller.
Daylight harvesting does not affect the operation of wall switches or occupancy sensors when
the light is ON. If the light is ON, either a switch or occupancy sensor can override with an OFF
action or dim to below the daylighting control value. See

Daylighting Control Override

The open or closed loop daylighting features can be temporarily overridden by enabling the
daylighting manual override parameter. The override has a timer that releases the override,
and once the timer expires the daylighting control resumes.
If the override is enabled on the controller, a manually controlled switch can turn lights ON
and manually set the dimming level.
Garibaldi Pro software is required to configure both the daylighting manual override timer and
daylighting manual override enable parameters.

Closed Loop Control

In closed loop daylighting, the sensor indirectly monitors the controlled light output from the
fixtures plus some of the natural light contribution.
Note:
location where it is significantly affected by light level changes. If not,
Control on page 13
When the lights are on, closed loop daylighting tries to maintain a given set point level within
the space. This level is specified in the closed loop daylighting set point parameter. The
controller only adjusts the dimming output on received photo sensor messages and only when
the light is ON. If the light is OFF, closed loop daylighting is ignored.
Note:
close the blinds or complete this step at night. A photo sensor and a switch must be
linked to the controller.
Daylight Harvesting Applications
The controller supports only one linked photo sensor. If using multisensors,
For closed loop control to function properly, the sensor must be installed in a
should be used.
This process is best performed when there is little or no natural light; either
Photo Inhibit on page 8.
Open Loop
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