EnOcean GmbH STM250 Manual De Usuario
3.3 Transmission Range
The main factors that influence the system transmission range are type and location of the
antennas of the receiver and the transmitter, type of terrain and degree of obstruction of the
link path, sources of interference affecting the receiver, and “dead” spots caused by signal
antennas of the receiver and the transmitter, type of terrain and degree of obstruction of the
link path, sources of interference affecting the receiver, and “dead” spots caused by signal
reflections from nearby conductive objects. Since the expected transmission range strongly
depends on this system conditions, range tests should categorically be performed before
depends on this system conditions, range tests should categorically be performed before
notification of a particular range that will be attainable by a particular application.
The following figures for expected transmission range are considered by using the STM 250
radio transmitter device and the RCM 120 radio receiver device with the provided whip
radio transmitter device and the RCM 120 radio receiver device with the provided whip
antennas and may be used as a rough guide only:
-
30 m for obstructed environment (e.g. inside a building)
-
300 m for unobstructed environment (free space propagation)
Further notes to determine the transmission range within buildings are available as download
from
from
3.4 CE Approval Requirements
The devices bear the EC conformity marking CE and conform to the R&TTE EU-directive on
radio equipment. The assembly conforms to the European and national requirements of
radio equipment. The assembly conforms to the European and national requirements of
electromagnetic compatibility. The conformity has been proven and the according
documentation has been deposited at EnOcean. The devices can be operated without
documentation has been deposited at EnOcean. The devices can be operated without
notification and free of charge in the area of the European Union, in Switzerland, in Croatia, in
Cyprus, in Czech, in Estonia, in Hungary, in Latvia, in Lithuania, in Malta, in Poland, in
Cyprus, in Czech, in Estonia, in Hungary, in Latvia, in Lithuania, in Malta, in Poland, in
Romania and in Slovenia. The following provisos apply:
• EnOcean RF devices must not be modified or used outside their specification
limits.
• EnOcean RF devices may only be used to transfer digital or digitized data. Analog
speech and/or music are not permitted.
• EnOcean RF devices must not be used with gain antennas, since this may result
in allowed ERP or spurious emission levels being exceeded.
• The final product incorporating EnOcean RF devices must itself meet the essential
requirement of the R&TTE Directive and a CE marking must be affixed on the final
product and on the sales packaging each. Operating instructions containing a
product and on the sales packaging each. Operating instructions containing a
Declaration of Conformity has to be attached.
• If the STM 250 transmitter is used according to the regulations of the 868.3 MHz
band, a so-called “Duty Cycle” of 1% per hour must not be exceeded. Permanent
transmitters such as radio earphones are not allowed. For approval aspects, it
must be ensured that the STM 250 reed contact is not operated more than
must be ensured that the STM 250 reed contact is not operated more than
13.000 times per hour (e.g. window opened or window closed). For this
calculation the extraordinary short telegram length is considered including all
calculation the extraordinary short telegram length is considered including all
subtelegrams (see Chapter 2.3.3). Also a tolerance of 5% in telegram length is
included.
included.
©EnOcean GmbH, A. Anders
Page 21 of 24
STM 250 User Manual V1.3