304
RF Ta
g In
sta
lla
tion Prec
aut
ions
Se
ction 11
RFID System
User's Manual
(Modbus TCP)
Section 11
Appendices
V680S-D8KF67
Influence of Metal at Back Surface of RF Tags
The communications range will decrease if there is metal at the back of the V680S-D8KF67 RF Tag. If
the RF Tag is mounted on metallic material, use a non-metallic spacer (e.g., plastic or resin). The
following graphs show the relationship between the distance from the RF Tag to the metallic surface
and the communications range.
V680S-HMD64-ETN and V680S-D8KF67
V680S-HMD66-ETN and V680S-D8KF67
Communications range (range with
no metal at back surface = 100%)
Distance (x) to the metal plate in back of RF Tag
Communications range (range with
no metal at back surface = 100%)
Distance (x) to the metal plate in back of RF Tag
X
0
10
20
30
40
50
60
70
80
90
100
50
100
150
200
(mm)
(%)
X
X
0
10
20
30
40
50
60
70
80
90
100
100
200
300
350
(mm)
(%)
0
10
20
30
40
50
60
70
80
90
100
50
100
150
200
(mm)
(%)
V680S-HMD63-ETN and V680S-D8KF67
Communications range (range with
no metal at back surface = 100%)
Distance (x) to the metal plate in back of RF Tag
Y
Communications
range
Reader/Writer
RF Tag
Metal
Metal at back
surface
Y
Communications
range
Reader/Writer
RF Tag
Metal
Non-metallic material
Metal at back
surface
Y
Communications
range
Reader/Writer
RF Tag
Metal
Metal at back
surface
Non-metallic material
Non-metallic material
