Interaction Read/Write Heads And Data Carrier - Balluff BIS C-300 Serie Handbuch

C3-slk_716464_E_1110.p65
7
Spatial Arrangement
of Read/Write Head
and Data Carrier
8
Spatial arrangement of
Read/Write Head and
Data Carrier for non-
directional Read/Write
Heads and flush
mounting (circular
antenna)
8 english
Interaction
Read/Write Heads and Data Carrier
The key to reliable data exchange between the read/write head and the data carrier is
maintaining sufficient dwell time of the data carrier within a specified spatial distance from
the read/write head. The sketches on the two following pages are intended to clarify this
requirement, in the first sketch for read/write heads with non-directional operation, in the
second for read/write heads in cases where the data carriers have to pass by from a
certain direction or at a certain orientation.
In static read/write operation the data carrier stops completely in front of the read/write
head during the read/write process; this permits a greater distance between the two.
In dynamic operation the data carrier is read or programmed on the fly. A shorter distance is
necessary in order to achieve as large a read/write range as possible.
Each read/write head has certain data carriers which can be used with it (the pairing is
based on physical size and antenna field configuration). The associated specifications for
distance and permissible offset are indicated as well as the distance and relative speed
between the read/write head and the data carrier.
Interaction
Read/Write Heads and Data Carrier
Permissible
offset
Sensing surface for reading
and writing to the data carriers
Data carrier
Read/write head
7
english
Permissible offset