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Every room where smoke from fire shall be detected, must be equipped with a smoke detector. A central apartment unit is capable of monitoring a maximum of 12 smoke detectors (1 per room).

If a smoke detector detects smoke (acoustic signal), an alarm is sent to the QAX910 central apartment unit via KNX RF. The QAX910 then activates the built-in buzzer and energizes an alarm relay. At the same time, various scenarios can be enabled (e.g. ventilation plant off, all lights on, etc.).

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Per room, a maximum of 6 windows can be monitored by RF window switches. An other RF window switch (reed contact) can be hard-wired (max. distance 10 m) to the RF window switch. If, after activating monitoring and on completion of the monitoring delay time, a window released for monitoring is opened, an alarm is set off.

As soon as a window is opened, the heating valve closes when the set period of time has elapsed, thus preventing heating energy from being wasted. When leaving the apartment / house, the system displays a list with all open windows, asking the user to close them. Otherwise, an alarm is set off.

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Per apartment / house, a maximum of 2 doors can be monitored by RF door contacts. If, after activating monitoring and on completion of the monitoring delay time, a door released for monitoring is opened, an alarm is set off.