Understanding Tunable White Control Modes for the Echoflex ELED2 Tunable White Dimming Controller
Question
What are the different operating modes for the Echoflex Tunable White Dimming Controller (ELED2), and what are the applications for each one?
Answer
The ELED2 supports 4 different tunable white operating modes, each depending on what control devices are linked to each of the 3 channels.
Channel assignments
- Intensity Control
- Tunable-White Control (color temperature)
- Set Point
Modes
Dim-To-Warm
- What is linked: at least 1 switch to channel 1, nothing to channel 2 or 3.
- Sensors may also be linked to channel 1 in addition to switches.
- Functionality: as the channel dims out, the fixture will gradually move to a warmer color temperature, mimicking the red shift of an incandescent load.
Explicit Color Temperature Control
- What is linked: at least 1 switch to channel 1, at least 1 switch to channel 2, nothing to channel 3.
- Functionality: explicit control of both intensity and color temperature via different switches.
- Example: Press and hold the off side of the switch linked to channel 1, intensity decreases, while color temperature remains the same. Press and hold the on side of the switch linked to channel 2, color temperature becomes cooler.
- Note on color temperature control: a single tap of "on" or "off" will incrementally ramp the color temperature cooler/warmer, while pressing and holding will continually ramp as long as the button is held.
Automated Color Tuning
- What is linked: a TAP41 CCT photo sensor is linked to all 3 channels for control of intensity and closed-loop color temperature control.
- It is recommended that an occupancy sensor or switch is linked to channel 1 for relay control.
- Functionality: Automated control of intensity and color temperature.
Characterized Color Tuning
- What is linked: at least 1 FLS-41 to channel 3.
- Functionality: Tunable white output modulates based on the value provided by the linked FLS-41.
- Note on characterized color tuning: This operation requires the fixture's characterized specifications for the 0–10 V channel be defined with the controller’s configuration.
- Example: A fixture is used that maps a range of 3200–6000 K across the 0–10 V range. These values are pre-configured with the ELED2-BU or ELED2H-AU at the factory. The tunable white output modulates based on the value provided by a linked FLS-41 sensor on the set point value. In the case of a system that is not pre-configured, these values would need to be sent to the contorller via Garibaldi pro.
- Note on characterized color tuning: This operation requires the fixture's characterized specifications for the 0–10 V channel be defined with the controller’s configuration.