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Siemens
Wall-mounted sensors and room operator units for KNX/ETS and KNX/ACS
CM2N1602en_05
Building Technologies
Functionality / Use
2018-09-14
4.4.2 Control and operation
Typ
Regelung und Bedienung
P
ID
c
ont
rol
te
m
per
at
ur
e
Thr
es
hol
d v
al
ue s
w
itc
h
hu
m
idi
ty
Thr
es
hol
d v
al
ue s
w
itc
h
C
O
2
O
per
at
ion of
li
ght
, s
hadi
ng and
sc
enes
M
anual
s
w
itc
hi
ng
of
v
ent
ila
tion
R
oom
oper
at
ing m
ode
P
res
enc
e f
un
ct
ion
O
nl
y oper
at
ion and di
spl
ay
Sensors
QMX3.P30
X X
QMX3.P40
X
QMX3.P70
X X
X
Room
operator
units
QMX3.P02
X X
X
QMX3.P34
X X
X
X
X
X
QMX3.P74
X X
X
X
X
X
X
QMX3.P37
X X
X
X
X
X
X
The room operator units can be connected via bus to suitable KNX heating,
ventilating, and air conditioning actuators via integrated control functions for room
temperature, humidity, and air quality.
A proven PID controller for
heating and cooling
is provided to control the room
temperature. The controller supplies a continuous or a pulse-width-modulated PID
signal for one heating and one cooling actuator. The room temperature setpoints
for the two operating modes heating and cooling as well as a blocking object can
be set using the touchkeys and the display, or received from the bus. Changeover
to the operating mode Heating/Cooling is automatic. Preset control parameters,
adjusted for the heating type or cooling type, are available for selection.
The integrated
room humidity
controller and
room air quality
controller can be
used for ventilation control. For both controllers, the setpoints can be adjusted
using touchkeys and display, or they can receive up to three switching point values
via the bus.
When the respective switching point is exceeded, up to three control signals and
one quasi-continuous signal to control the ventilation actuators are transmitted to
other bus members. In addition, a signal with the max. control value from both
Control functions
(KNX all types)
