Control And Operation - Siemens QMX3.P37 Technical Principles

Sensors
Room
operator
units
Control functions
(KNX S-Mode all types
20 / 40
Siemens
Building Technologies
5.5.2

Control and operation

Product number
QMX3.P30
QMX3.P70
QMX3.P02
QMX3.P34
QMX3.P74
QMX3.P37
The room operator units can be connected via bus to suitable KNX S-Mode
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 to the building 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
Wall-mounted sensors and room operator units for KNX S-Mode and KNX LTE-Mode CM2N1602en_01
Functionality / Use
Control and operation
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2013-07-04