Function | Function as media coupler
RF/TP media coupler/repeater | Order no. 5110 00 | 51103300
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Image 4: Example of a possible KNX topology with RF and TP segments
Media coupler as segment coupler
MC
Media coupler as segment coupler (TP, RF)
LC
Line coupler (TP)
BC
Backbone coupler (as IP router / TP, IP)
PSU
Voltage supply (TP)
Different RF domains in one KNX installation
Devices in different RF domains must be topologically divided into two different lines
or areas or segments, each with their own domain addresses. These different areas
or lines must also contain their own media couplers for the devices to be able to com-
municate with one another, irrespective of the line. The logical connection between
two or more KNX RF environments is thus always made via media couplers and
higher-level TP or IP lines (see figure 5).
KNX RF USB data interfaces, as used in the ETS, are also assigned to a domain ad-
dress. In consequence, only RF devices of the same domain can be commissioned
directly by radio telegram. Only group telegrams and physically addressed telegrams
