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Siemens
Central apartment unit QAX910
CE1N2707en
Building Technologies
06.01.2009
Specific functions for monitoring and operation
The central apartment unit monitors the connected door and window contacts.
A monitoring delay time can be parameterized for the door / window contacts and,
in addition, a message delay time for the door contacts.
The opening of a monitored door / window contact can be used for triggering a
switching group (event-driven) and for generating an alarm message.
In addition, the door and window contacts are used for the window airing function.
As soon as a window monitored by a window contact is opened, the heating cir-
cuits of the respective room prevents their valves from opening further, even if the
room temperature drops for short periods of time. When an adjustable period of
time has elapsed, the room temperature drops to the level of Protection mode until
the window is closed again. Then, “normal“ control mode is resumed.
An open window can also impact operation of ventilation plant or an air conditioner.
This prevents unnecessary heat losses during the airing phase and subsequent
overheating.
The central apartment unit monitors the connected smoke detectors.
A responding smoke detector can be used for triggering a switching group and for
switching the ventilation plant (event-driven) and sets off an alarm in any case.
The central apartment unit acquires the outside temperature and atmospheric
pressure transmitted by the meteo sensor or via KNX-TP1.
The current measured values of atmospheric pressure and outside temperature, as
well as the trend of atmospheric pressure, can be displayed in the quiescent pic-
ture. The picture shows the atmospheric pressure changes over the last few hours,
indicated by an arrow.
In addition, the weather trend (sunny, cloudy, rainy) is ascertained based on the
change of atmospheric pressure and absolute pressure, and displayed in the qui-
escent picture.
The progression of outside temperature and atmospheric pressure over the last 24
hours can be called up via 2 Info pages.
Every connected lamp can be individually switched or dimmed via the central
apartment unit or external switches (transmitters).
In addition to manual operations, the light settings can be made via the internal
time switch (time switch can "Always“ be processed or "Only if absent“), presence
simulation, scenes or events (e.g. twilight, absence).
Suited are Siemens GAMMA wave and wireless Hager tebis KNX light actuators,
as well as KNX TP1 light actuators.
The central apartment unit or external switches (transmitters) can be used to adjust
the blinds in a stepwise fashion, or to fully raise or fully lower them by pressing a
button.
In addition to manual adjustments, the blinds can be set via the internal time switch
(time switch can "Always“ be processed or "Only if absent“), scenes or events (e.g.
twilight, absence).
Suited are Siemens GAMMA wave and Hager tebis blind actuators, as well as KNX
TP1 blind actuators.
Door and
window contacts
Smoke detectors
Weather station
Light control
Blind control
