Catalog

Compact room controller RXB with KNX
RXB applications
RXB hardware
The product range comprises compact
controllers and corresponding room units
for comfortable control. The compact room
controllers are optimized to the respective
application with regard to input/output
configuration. HVAC functions are operated
via standard room units.
Communication is based on KNX S-mode.
The fan coil room controllers also communi-
cate in KNX LTE mode. KNX LTE mode is used
to communicate with control equipment from
the Synco™ 700 product range.
RXB software
Each RXB unit comes with preloaded applica-
tion software featuring one or several appli-
cations (see next page). The ETS software
helps engineer and commission a network
with RXB units. In addition, the Synco™ tool
and room unit QAX34.3 by Siemens can
be used for commissioning and parameter-
ization.
Connection to the Desigo building
automation and control system
Desigo PX KNX allow flexibly connecting RXB
controllers to the Desigo building automation
and control system, and hence acts as a
gateway to BACnet. The connection provides
access to other functions such as time
schedules and central control of set points.
RXB thus fits into the overall expandable
modular system, and ensures long-term
cost-efficiency.
Integration into Synco™
The Synco™ central control unit RMB795
is used for controlling and monitoring the
RXB controllers in a Synco™ system.
HVAC Chilled ceiling
radiator-type
systems
• QAX30
• QAX31
• QAX32
• QAX33
• QAX34
• QAX39
• QAX84
• AQR2531..
KNX (S- and LTE-mode)
Fan coil units
• RXB21.1
• RXB22.1
• RXB24.1
• RXB39.1
Room units Controllers
Fields of application
The scope of RXB is defined by the prepro-
grammed application software. The following
pages provide an overview of the options
and the corresponding devices, divided into
different areas of application. The devices
are supplied preprogrammed with the appli-
cations. The required application can be
selected by means of the ETS, Synco™ tool
or the Handy tool QAX34.3.
Due to the fact that the applications are
predefined, engineering simply involves the
definition of a small number of parameters,
e.g.:
• PWM or 3-position control of the valves
and actuators
• Temperature set points
• Manual or automatic fan control
• Room operating units QAX3.., QAX84.1
(PPS2 interface)
Fan coil systems
Application Description Devices
FNC02 2-pipe system with changeover RXB21.1/FC-10
FNC03 2-pipe system with changeover and electrical reheater RXB22.1/FC-12
FNC04 4-pipe system RXB21.1/FC-10
FNC05 4-pipe system with electrical reheater RXB22.1/FC-12
FNC08 4-pipe system with supply air temperature limitation RXB21.1/FC-10
FNC10 2-pipe system with changeover and outside air damper RXB21.1/FC-11
FNC12 4-pipe system with outside damper RXB21.1/FC-11
FNC18 2-pipe system with changeover and radiator RXB21.1/FC-11
FNC20 4-pipe system with air-side control RXB21.1/FC-10
FNC02/03/04/08 2-pipe/4-pipe system with EC fan-coil support RXB39.1/FC13
Common functions
• Window contact, occupancy detector,
4 operating modes
• Manual fan control with room unit
• Automatic fan control (RXB21.1/RXB22.1
3 speed; RXB39.1 continous fan speed
0..10V)
• Options for 2-pipe systems: heating only,
cooling only or changeover, via KNX bus
Heated/chilled ceilings and radiators
Application Description Devices
CLC01 Chilled ceiling with dewpoint monitoring RXB24.1/CC-02
CLC02 Chilled ceiling with dewpoint monitoring and radiator RXB24.1/CC-02
RAD01 Radiator with downdraft compensation RXB24.1/CC-02
Common functions
• Window contact, occupancy detector,
4 operating modes
4–26
4–27
1 1
3
2
3
2
4 4
Room automation
Overview and selection tools
Room automation
Overview and selection tools