Siemens Desigo RXB, Technical Manual, Page: 301 / 476

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Siemens RXB (KNX) application library FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies Room operating modes 28 Feb 2009
5.6.1 Local control of room operating mode via the
window contact input
Window contact
PPS2
Local
1.
DI
DI
3.
Controller
3.
Prio
Whenever a window is opened, the room controller always
switches to the
Protection room operating mode, i.e. the
heating or cooling output is reduced to a minimum.
The window contact is connected directly to a digital input of the room controller (see
page 126).
The table below shows the
effective room operating mode as a function of the window
contact input.
Status of window
contact Effective room operating mode
No window contact Comfort (default)
Window closed No effect.
Operating mode is determined by inputs with a lower priority
Window open Protection mode
5.6.2 Local control of room operating mode via a
presence detector
Presence detector
PPS2
Local
1.
DI
DI
3.
Controller
3.
Prio
A presence detector detects the presence of people in the
room and controls the room operating mode of a room
controller.
The presence detector is connected directly to a digital input of the room controller (see
page 126).
•
The change in the effective room operating mode is event-driven, the key factor
being the point at which the effective occupancy changes.
•
The room unit (which is also Priority 3) can cause the effective room operating mode
to change again Æ the last command always applies.
Effective
room operating mode
Effective
room operating mode
.
.
.