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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
Introduction
28 Feb 2009
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 ETS3 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 Building Technologies
ACX95.320/ALG
Power supply 320 mA
Siemens Automation and Drives
5WG1 125-1AB01 Power supply 160 mA
5WG1 125-1AB11 Power supply 320 mA
5WG1 125-1AB21 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 = Standard 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 ETS3
Professional and group addresses.
This ensures a link to the existing EIB environment.
For more details of this mode, refer to the EIB manual.