Gira 5110 00 Product Documentation page 50

Figure 22: Use of a media coupler as a repeater for signal amplification and elimination of radio
Domain address for KNX RF
The radio range of KNX RF devices cannot be determined exactly in spatial terms. KNX RF
telegrams cannot be limited to one specific KNX installation. Radio telegrams pass through the
borders of buildings and plots of land and can be received by devices installed in neighbouring
KNX systems. For this reason, it is important that different KNX RF installations are delimited
topologically and thus logically from one another. The domain address helps here.
In accordance with the topology defined in the ETS project, devices assigned to the RF lines
also always receive a domain address, in addition to the physical addresses. Only devices with
the same domain address can communicate with each other within an RF environment. As a
result, a media coupler must always have the same domain address as all the devices in its
subordinate RF line.
i The domain address is defined in the ETS for each RF line or for each RF area. If an area
is set to the media types "RF", then all the subordinate RF lines automatically receive the
same domain address in the ETS.
The ETS programs the domain address automatically into the RF devices when the
physical address is programmed.
i A domain address is 6 bytes long and is entered in the ETS in hexadecimals or generated
automatically. After the first 2 bytes, the input notation requires a colon (when read from the
left). For example, a domain address could look like this: "0011:22334455" or
"00FA:4F5B3122".
Order No. 5110 00
shadow for indoor and outdoor applications
Software "Media coupler / repeater"
Parameters
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