Omron V680S Series User Manual page 235

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
Distance (x) to the metal plate in back of RF Tag
Reader/Writer
Y
Communications
range
Metal
 Mutual Interference of RF Tags
If you use more than one RF Tag, separate them by at least the interval shown below to prevent
malfunctions due to mutual interference.
If the distance between the RF tags is too short, read / write distance will be reduced.
 V680S-HMD64-ETN Reader/Writer
 V680S-HMD66-ETN Reader/Writer
RF Tag
Metal at back surface
X
80mm min.
120mm min.
V680S-HMD66-ETN and V680S-D8KF67
Distance (x) to the metal plate in back of RF Tag
Reader/Writer
RF Tag
Y
Communications
range
Metal
80mm min.
120mm min.
Section 8
Appendices
Metal at back surfa
X
RFID System
233
User's Manual