Mediola 2 channel wireless/door/window contact FS20 TFK2 652-77 데이터 시트

• The FS20 wireless control system (and therefore also the ‘FS20 TFK’) uses the 868MHz

range, which is also used by other radio services. Therefore devices that operate on the
same or neighbouring frequencies may restrict both its operation and its range.

• The specified range of 100m is the free-field range, which means the range with visual

contact between the transmitter and receiver. In practice however, there are ceilings, walls,
garages or adjoining buildings between the transmitter and the receiver that affect and
reduce the range accordingly.

A repeater is available to increase the range of the FS20 system. This forwards the radio
commands it receives from the FS20, which results in a greater wireless range.

• The actual attainable distance between the transmitter and receiver in normal operation

depends very much on the installation location and the environment.

As a rule – when mounted in a family home, for example – all components should operate
faultlessly and experience no radio reception problems.

• All types of high-frequency interference

• Any buildings or vegetation

• Conductive metal parts that are located near the devices or within or near their transmission

path, for instance, radiators, metallised insulation glass windows, reinforced concrete
ceilings, etc.

• Influence on the radiation pattern of antennas due to the distance from the transmitter or

receiver to conductive surfaces or objects (also to human bodies or the ground)

• Broadband interference in urban areas that reduces the signal-to-noise ratio; the signal is

no longer recognised due to this ‘noise’

• Interference radiation resulting from insufficiently shielded electronic devices, for example,

operating computers or similar