Chapter
10
Operating Instructions
Radio Frequency Identification RFH620 Interrogator
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8013171/ZO93/2017-08-08
© SICK AG • Germany • All rights reserved • Subject to change without notice
Appendi
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3.5 RFH620 method of operation
The RFH620 is an intelligent sensor system for automatic and non-contact detection and
decoding of SISO/IEC15693 compliant transponders. In principle, the transponders can
be detected on any side of still or moving objects in a conveyor system. Several RFID
devices can be combined to allow detection of several sides in one passage (multi-side
reading).
The RFH620 creates a high frequency field to recognise transponders. The transponder
itself generate out of the field the power for operation and the data send from the RFID
device and respond data to the interrogator using field load modulation. The size of the
reading field depends mainly on the used transponder (size and Q-factor) and the
environment (metal objects).
Figure 3-6: HF Technology – principle overview
To control a process, external sensors could deliver information via the reading pulse,
the object distance and the conveyor speed (increment). The reading/writing results are
output to the RFH620 data interfaces and forwarded to a host/PC.
Figure 3-7: Methods of operation in a conveyor system
