User Manual

77
RFID System
User's Manual
Section 4 Installing Tags
Section 4
Installation
 Influence of Metal Behind Tag (Reference)
Take the influence of metal behind Tags into consideration when mounting them.
The communications distance is adversely affected if there is any metal material around the Tag. The
degree of influence depends on the type, size, and shape of the material around the Tag. The following
graphs show the influence of metal objects behind the Tag for reference.
• Influence of Metal
The following diagram shows the rate of reduction in the communications distance when metal is
located behind the Tag. The horizontal axis in the diagram indicates the distance between the 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
 Mutual Interference with Tag (Reference)
Provide the mounting distances indicated below to prevent malfunctions due to mutual interference
when using multiple Tags.
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
Antenna
Tag
V680-H01-V2 and V680-D1KP58HT
The communications distance without metal is 100%.
Distance to metal (x)
Metal on back
250mm min. 250mm min.