Operating Instructions

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Siemens RXB (KNX) application library RXB Description of functions for FC-10, FC-11, FC-12, FC-13 CM110385en_08
Building Technologies Introduction 2013-06-17
1.7 Bus supply for RXB controllers
RXB controllers can work without bus supply if the following conditions are adhered to:
Parameterize only using the HandyTool (not with ETS or ACS).
No integration in a building automation and control system (e.g. Desigo, Synco).
No changeover mode (sensor signal via bus).
No outdoor temperature via bus
No master/slave combinations.
Otherwise, the Konnex bus, used by the RXB room controller for communication,
requires a bus supply.
Each controller consumes 5 mA. The supply has to be selected according to the
number of controllers. We recommend the following products:
Manufacturer
Type
Designation
Siemens Low Voltage
5WG1 125-1AB02
Power supply 160 mA
5WG1 125-1AB12
Power supply 320 mA
5WG1 125-1AB22
Power supply 640 mA
1.8 RXB Konnex controller communications
RXB Konnex controllers support communication as per the Konnex specification.
Among the modes defined in this specification are the following:
S-Mode = System mode
LTE mode = Logical Tag Extended Mode
This is a new mode which supports simpler
engineering and is used in conjunction with Synco.
1.8.1 S-Mode
This mode corresponds to EIB communication. Connections are established via ETS
Professional and group addresses.
This ensures a link to the existing EIB environment.
For more details of this mode, refer to the EIB manual.