Poznámky redaktora
walls and ceilings are penetrated along the trans-
mission path (Fig.5m from the ground.666 Gira electrical installation systems
eNet Planning information
I
Technical
information
Planning information eNet
Optimum wireless connections and optimum use the ranges of
wireless components are achieved observing the following basic
rules:
-
The antennae the transmitters and receivers should, the greatest
extent possible, all aligned vertically horizontally. 1), the wireless range depends considerably the
type construction materials penetrated and the effective wall
thickness.
-
To correct irregular reception, often sufficient move the transmit-
ter receiver few centimetres.
-
Transmitters and receivers are not installed behind metal con-
ductive surfaces, such anti-static floors, sounding with metal clad-
ding, cable lines, metal louvered ceilings and hot-water and electrical
floor heating.
Requirements for the measurement field ranges:
-
Level area
-
Horizontal distance interfering objects from each point the line
connecting the transmitter and receiver 20m
-
Height the measured objects above the ground 2m
-
Alignment the measured objects for optimum contact
-
Moist ground
ca.0m
28m 0. always stated,
which refers undisturbed propagation radio waves and optimally
aligned antennae.5m
34m 1. Withthe eNet system this usually100 m.
In addition, when selecting the installation sites, observe the fol-
lowing items particular:
-
We recommend checking the planned system the building with the
respective devices (e. Here, you
should also take the state construction the building, g. For
this reason, interference cannot ruled out.degree
of drying out spackle and plaster, and the existing doors and armour
or hangings the windows into account.
-
Wireless components other function groups, wireless head-
phones telephones, must kept least away.
Note
-
Only two repeaters may used wireless zone.
- repeater should installed close possible the midpoint
between transmitters and receivers and also not near other transmit-
ters receivers.
-
The length antennae may not changed, they are perfectly
matched the wavelength the frequency. 70%
Reinforced concrete approx.
Dependence the transmission ranges the mounting height:
Theoretical transmission ranges Mounting height the receiver
100m 2m
56m 1. 90%
Brick, pressboard approx. The table shows the capability wireless signals penetrate
different materials.
Dry material Penetration
Wood, plaster, sheetrock approx. 30%
Metal, metal grids, aluminium cladding approx. 10%
Important:
Moisture the material reduces penetration
A B
Fig.
-
Large metal surfaces, such metal doors and frames, aluminium
blinds metal cabinets should kept great distance possi-
ble (several decimetres). emergency-stop, emer-
gency call etc. g. 100 m
> m
> m
> m
> m
> m
(A) (B)
(C) (C)
Fig. minimum distance should heeded here to
prevent saturation. This reception interference often
occurs due shadowing, obliteration, reflections the wireless
signal sometimes occur with car radios and mobile telephones,
for example.
-
Electronic devices, such motors, electronic control gear and Tronic
transformers, must kept distance least 50cm. The wireless transmission
is thus not suitable for security purposes, e. Therefore, the open field range (Fig.2m
Conditions: The mounting height the transmitter 2m
– Moist ground
.from the wireless presentation case) for relia-
ble wireless connection before using wireless components. Measurement the range between the transmitter (A) and the recipient (B)
and recommended distance from interfering factors (C).
-
Transmitters and receivers should not installed near the ground. We
recommend not installing them lower than 0. g. Attenuation reduces the strength the wireless signal between the
transmitter (A) and the receiver (B)
Evaluating wireless paths buildings very difficult due multitude
of influences.8m
23m 0.6m
18m 0.
Wireless transmission occurs non-exclusive transmission path.4m
13m 0
