Gira 5110 00 Product Documentation page 49

Software "Media coupler / repeater"
Parameters
The use of more than one RF line is wise in large or extensive buildings or building sections, as
the RF lines can then be separated sufficiently from one another, meaning that they no longer
have a negative influence on one another. Different RF lines, each with their own media
couplers, can also be used in smaller buildings (e.g. detached houses) or in apartment
buildings, if the building structure and the consistency of the ceilings and walls shields the
individual RF areas sufficiently (Figure 21). Underfloor heating can, for example, provide
sufficient attenuation of the radio signals in the vertical direction. In the long-distance range,
solid, supporting walls can make a positive contribution to achieving sufficiently large
attenuation of the radio signals.
Figure 21: Building structure with two KNX RF lines, which do not influence each other
negatively due to the building consistency (example)
A media coupler can also be used outdoors (if necessary as a repeater) in a suitable installation
socket (ideally plastic AP WG), in order to make the KNX RF signals available directly between
buildings or to amplify them. This means that KNX RF devices can be used outdoors - if the
consistency of the buildings allows it - or in separate buildings (e.g. shed) (Figure 22).
Ideally, a repeater can also be used for signal amplification and the elimination of radio shadow
through metallic furnishings or substances in the interior of the building.
Order No. 5110 00 Page 49 of 57