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93
RFID System
User's Manual
Sec
Ins
ta
lling RF Tags
Installation
Influence of Metal Behind RF Tag (Reference)
Take the influence of metal behind RF Tags into consideration when mounting them.
The communications distance is adversely affected if there is any metal material around the RF Tag.
The degree of influence depends on the type, size, and shape of the material around the RF Tag. The
following graphs show the influence of metal objects behind the RF Tag for reference.
• Influence of Metal
The following diagram shows the rate of reduction in the communications distance when metal is
located behind the RF Tag. The horizontal axis in the diagram indicates the distance between the RF
Tag and the metal plate, and the vertical axis indicates the relative communications distance at 100%
without a metal plate, i.e, the rate of reduction in communications distance.
Material: Steel (t = 1.5 mm)
Shape: 295 mm
×
295 mm
0
10
20
30
40
50
60
70
80
90
100
10 20 30 40 50
(mm)
(%)
60 70 80 90 100110120130140150160170180190
Y
Communi-
cations
distance
X
V680-H01-V2
V680-D1KP58HTN
V680-H01-V2 and V680-D1KP58HTN
The comm
u
nications distance
w
itho
u
t
metal is 100
%
.
Distance to metal (x)
Metal on
b
ac
k
N
on-metallic mater
ial
Y
Communi-
cations
distance
X
V680-D1KP58HTN
V680-HS65
0
10
20
30
40
50
60
70
80
90
100
10 20 30 40 50
(mm)
(%)
60 70 80 90 100110120130140150160170180190
V680-HS65 and V680-D1KP58HTN
The comm
u
nications distance
w
itho
u
t
metal is 100
%
.
Distance to metal (x)
N
on-metallic mater
ial
Metal on
b
ac
k