SERVODAN 79-985 Mode D'emploi page 6

RF signals
RF wireless information.
The repeater has a built-in RF transmitter with EnOcean
technology. The frequency of this RF signal is 868 MHz and, with
a transmission output of less than 10 mW, an RF environment
is created that is typically at least 100 times less than that of
conventional wireless systems.
RF signal distance/penetration
As an RF signal involves electromagnetic oscillations/waves (of
a certain fi eld strength), these are suppressed on the way to the
receiver. The RF signal's fi eld strength weakens proportionally by
the square of the distance between transmitter and receiver.
However, this natural reduction of the fi eld strength as a function
of distance is not the only suppression that affects the distance.
Metal parts, e.g. in connection with reinforcements to wall and
ceiling elements, metal foil in damp barriers or UV/colour fi lters
through metal foil will all refl ect, distort or suppress the RF signal
on its way to the receiver. Fig. 4a.
Below is a list of penetration rates for commonly used building
materials:
Materials
Wood, plaster and glass without surface foil
Brick, MDF and chipboard panels
Concrete reinforcement
Metal, aluminium panels, etc.
In practice this means that the materials on the premises have
a decisive infl uence on the distance between transmitter and
receiver. As a guideline the following distances can be used.
Visible distance between transmitter and receiver:
Typically 30 m in walkways, up to 100 m in large rooms, e.g.
sports halls.
Plaster/wooden walls:
Typically 30 m distance through max. fi ve walls.
Brick/aerated concrete walls:
Typically 20 m distance through max. three walls.
Steel reinforced walls/ceilings (multi-storey buildings):
Typically 10 m distance through max. one ceiling/wall.
The angle at which the RF signal hits the wall/ceiling also has
an effect on the fi eld strength – straight angles provide optimal
results. Fig. 4b.
RF signals are affected by other high-frequency signals.
Devices that also use high-frequency signals, such as computers,
audio/video systems, mobile phones, electronic transformers,
connection units, frequency converters and other RF transmitters/
receivers are all considered to be sources of interference for the
wireless RF signal. We therefore recommend a minimum distance
to such devices of 0.5 metres.
RF transmitter rate of recurrence
The repeater's transmitter rate of recurrence is determined by the
incoming RF signal and is highly dependent on the connected
EnOcean products.
For further information see: www.enocean.com
Servodan A/S | Tel +45 7442 4726 | Fax + 45 7442 4035 | info@servodan.dk | www.servodan.com
Technical data
Input:
Power supply: ........................ 230 V AC 50 Hz ±10%
Power consumption:
Standby - 79-985 ............... less than 0.8 W
Standby - 79-986 ............... less than 1.6 W
Max. load ........................... less than 5.5 W
Output:
DC supply .............................. 24 V DC, ±2% (standby voltage).
Load ..................................... max. 200 mA (DC supply higher
Performance:
Enclosure class ..................... IP20.
Insulation class ...................... Class II.
Ambient temperature ............. +5 °C to +50 °C indoor use.
Performance for Repeater type 79-986:
Repeater ............................... EnOcean TCM110.
EnOcean technology ......... 868 MHz, <10 mW
RF range ............................ 100 metres in open space / clear
Penetration LED indicator green ............... RF signal transmitted
90 ... 100 % LED indicator yellow ............. Level 1
65 ... 95 % LED indicator red ................... Level 2
10 ... 80 % Switch 2 for changing to ....... Level 1
0 ... 10 % Switch 2 for changing to ....... Level 2
Approval:
CE pursuant to ...................... EN60669-2-1
EnOcean approval ................ See www.servodan.dk
than 22 V DC).
view 30 metres in buildings, see
RF wireless information.
GB
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