Reading Range On Flat Metallic Carrier Plates - Siemens SIMATIC RF640T Gen 2 Operating Instructions Manual

1.3.2

Reading range on flat metallic carrier plates

The transponder generally has linear polarization. The polarization axis runs as shown in the
diagram below. If the tag is centrically mounted on a flat metal plate, which may either be
almost square or circular, it can be aligned in any direction since the transmitting and
receiving RF660A antennas operate with circular polarization.
Figure 1-2
Table 1- 1
Carrier plate material
Metal plate of at least Ø 150 mm
Metal plate Ø 120 mm
Metal plate Ø 85 mm
Metal plate Ø 65 mm
On rectangular carrier plates, the reading distance depends on the mounting orientation of
the transponder
SIMATIC RF640T Gen 2
Operating Instructions, 05/2009, J31069-D0197-U001-A2-7618
Optimum positioning of the transponder on a (square or circular) metal plate
Reading range on flat metallic carrier plates
SIMATIC RF640T Gen 2
Reading range
100%
Approx. 80%
Approx. 55%
Approx. 40%
1.3 Planning the use
7