Omron V680 Series User Manual page 304

Section 11
Appendices
 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-HMD63-ETN Reader/Writer
 V680S-HMD64-ETN Reader/Writer
 V680S-HMD66-ETN Reader/Writer
RFID System
302
User's Manual
(Modbus TCP)
55 mm min.
70 mm min.
90 mm min.
55 mm min.
70 mm min.
90 mm min.