Eldes ESIM384 - Page 196

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ESIM384 Installation and Conguration Manual v1.1
• Wrong antenna mounting by the ceiling:
Ceiling
Wall Wall
Ceiling
• Massive objects made of metal, such as metallic separation walls and metal inserted ceilings, massive wall reinforcements and the metal
foil of heat insulations, reect electromagnetic waves and thus create what is known as radio shadow. However singularized small metal
studs, e.g. the metal studs of a gypsum dry wall, don’t show a recognizable screening.
• Internal antenna, mounted on metal surfaces (typically 30% loss of range)
• Using any type of antenna inside metallic frames (typically 30% loss of range)
Antenna
Wireless
device
Wireless
device
Wireless
device
ESIM384
0.5 m to 30 m
(1.64 to 98.43ft)
inside the building
0.5 m to 150 m
(1.64 to 492.13ft)
in open areas
Recommended installation:
• face the front side of the wire-
less device towards the an-
tenna
• keep the distance: 0,5 to 30m
(1.64 to 98.43ft) inside the
building, 0,5 to 150m (1.64 to
492.13ft) in open areas
• Keep the distance of at least 20cm (7.87in) or more between your wireless device/Alarm System and the metal box/metal sheet or any
object of this material:
Metal box or
any metal
ESIM384
>20 cm
• Metal separation walls: It can be noticed that radio transmission even works with metal indoor separation walls. This happens through
reections: Walls made of metal or concrete reect the electromagnetic waves. The radio waves reach the next room or oor via a non
metallic opening.
Wall
Wall
Metal
sheet
Alarm
System
Wireless
device