User's Manual

OBID
®
classic-pro Installation ID CPR44
FEIG ELECTRONIC GmbH Page 13 of 16 ID CPR44 User Manual-
01.doc
3.5.3. EMC effects from magnetic fields
The communication principle of RFID- Technology is based on the modulation of electromagnetic
fields. Alternating magnetic fields in the vicinity of the antenna can have a negative influence on
the reader function.
Sources of such magnetic interference fields include coils within a primary or secondary switching
power supply.
When determining the position of the reader and antenna within a device, check the device for any
possible sources of interference as described above. If necessary, use shielding to suppress such
interference.