Siemens Desigo TRA Engineering, Mounting And Installation Manual page 76

Distances from receive
to other sources of
interference
Repeaters
76 / 84
Siemens
Building Technologies
>10 cm
>4 in
Mounting magnetic foot antenna
Tip When laying the antenna cable it is important not to bend the cable,
causing irreparable damage (reduction in performance caused by a
change to wave resistance).
A "active antenna" is a RF receiver with integrated antenna. It communicates with
an actuator unit, for example, via a simply RS485 cable (RS485 Gateway). So that
no shielded antenna is required that suffers from reduced performance as the
length increases and that can be bent during installation.
EnOcean transmitters can be placed next to any transmitter without a problem.
Conversely, the distance from the EnOcean receiver to other transmitters (e.g.
GSM / DECT / Wireless LAN) and high frequency sources of interference
(computer, audio and video systems) must be at least 50 cm.
>50 cm
>20 in
The distance of the EnOcean receiver to other high frequency transmitters
should be at least 50 cm / 20 in.
The transmitter position is non-critical.
Repeaters (i.e. amplifiers) can help overcome problems with reception quality. The
EnOcean repeater requires no configuring (e.g. self learning). Simply connect to
the supply voltage to commission. The Sections on "Shielding" and "Penetration"
include illustration on possible deployment.
Tip Post-installation of repeaters should be considered (electrical connection)
during planning for unfavorable situations. Too many repeaters is
counter-productive (higher costs, collision of telegrams).
EnOcean repeaters cannot be cascaded in their "1-level" basic function, previously
repeated telegrams will not be repeated again. Repeaters switchable to 2-level
function do allow for cascading via two repeaters. But it should only be used under
exceptional building-technical cases.
Desigo TRA Engineering, mounting and installation
EnOcean RF networks
>50 cm
>20 in
Mounting patch antenna
CM111043en_09
2016-02-22