Active and passive wireless sensors
from A for AAL to W for wireless building
Active wireless sensors
Wireless sensors which check their own ambient parameters and send wireless telegrams automatically are called active sensors. The ambient parameters include brightness, temperature or humidity.
The devices check and transmit either continuously or at defi ned time intervals to save battery power.
Wireless telegram receivers can be either actuators which trigger operations irrespective of their settings or indicators for measured parameters.
Passive wireless sensors
Wireless sensors which only transmit wireless telegrams when triggered manually are called passive sensors. They are mainly wireless pushbuttons.
Wireless telegram receivers are normally actuators which trigger operations irrespective of their settings.
A special case involves pushbutton actuators where a pushbutton is combined with an actuator and can teach in other wireless pushbuttons.