Battery Operation; Rf Link Properties - Siemens Desigo TRA Engineering, Mounting And Installation Manual

General information on
"radio signals"
STOP
Caution!
Used together with
third-party receivers
Siemens
Building Technologies
14.3

Battery operation

This section refers to room units equipped with solar cells.
Normally, ambient light suffices to charge the energy store required to operate the
room device. If, however, lighting conditions at the mounting location are
insufficient to meet guide values provided in Section 14.2 "Lighting conditions at
mounting location", insert a battery in the battery holder. This ensures device
operation even under unfavorable lighting conditions.
Use a lithium button cell battery (type CR2032).
It is widely available in electrical supply shops.
A battery can have a typical battery life of up to 5 years.
The battery will be emptied sooner if the device is operated in total darkness and
radio telegrams are transmitted frequently.
Battery-supported operation is neither necessary nor recommended if there is
sufficient light!

14.4 RF link properties

In Europe, room devices use frequency 868.3 MHz and 315 Mhz reserved for this
purpose. This frequency may be used for various applications (ISM) with some
limitations.
If radio signals on this frequency overlap and interfere, data transmission from a
room device to a receiver module may temporarily be impaired. The distance of
sender and receiver to various interference sources (e.g. audio/video systems,
computer) should at least be 50 cm.
Check sensitive medical devices using this frequency range in a case-by-case
basis.
For detailed information, see the description of the radio signal modules available
for download at: http://www.enocean-alliance.org/de/home.
Desigo TRA Engineering, mounting and installation
EnOcean RF networks
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