To change the daylight control mode, select the light contrast icon. Below is a description of each available setting:

 

Basic (ON/OFF) Luminaires will switch ON or OFF based on two configurable threshold levels. Sensors may or may not be affected by the nearby luminaires and the mode only operates when it is the highest priority item on control hierarchy.

 

Open loop Luminaire output level (0-100%) is obtained by comparing the sensor's lux reading against a response graph. Sensors should not be affected by the luminaires in the network and this mode can operate on the control hierarchy even if it is not the highest priority item. Some examples of this are: a group of luminaires controlled by a daylight sensor installed in a separate location to the luminaires, or controlled by a sensor facing towards a window away from the luminaires.

 

Closed loop A target lux level is manually specified and the sensor will actively try to reach and maintain the lux level via a feedback loop (by observing the results of its own changes). Sensors are affected by luminaires and this mode can only operate when it is the highest priority item on the control hierarchy. An example of this is a group of luminaire controlled by a daylight sensor located in the same area as the luminaires.

 

External Similar to the open loop option, but is based on a 0-100% dimming signal rather than a Lux level. This option is designed to be used to combine a Casambi unit with a sensor which is not Casambi-activated. Examples include a CBU-ASD connected to a non-Casambi activated sensor, or when dimming is performed by an external DALI controller or DALI sensor.

 

Casambi-ready sensors created by our partners already contain the Casambi firmware so there would be no need to use the External option with those devices.