Influence Of Conducting Walls On The Reading Range - Siemens SIMATIC RF640T Gen 2 Operating Instructions Manual

1.3.4

Influence of conducting walls on the reading range

If there are conducting walls or restrictions in the vicinity that could shade the radio field, a
distance of approx. 10 cm is recommended between the transponder and the wall In
principle, walls have least influence if the polarization axis is orthogonal to the conducting
wall.
Reading range: One conducting wall
Influence on reading range when positioned against one conducting wall
Distance d
Reading range
Reading range: Two conducting walls
Influence on reading range when positioned against two conducting walls
Distance d
Reading range
The values specified in the tables above must be complied with.
SIMATIC RF640T Gen 2
Operating Instructions, 05/2009, J31069-D0197-U001-A2-7618
20 mm 50 mm
Approx. 90 % Approx. 90 %
Approx. 80 % Approx. 90 %
Approx. 70 % Approx. 75 %
Top view
20 mm 50 mm
Approx. 75 % Approx. 90 %
Approx. 50 % Approx. 45 %
Approx. 40 % Approx. 45 %
Top view
100 mm
Approx. 95 %
Approx. 90 %
Approx. 90 %
100 mm
Approx. 90 %
Approx. 80 %
Approx. 75 %
SIMATIC RF640T Gen 2
1.3 Planning the use
Wall height 20 mm
Wall height 50 mm
Wall height 100 mm
Side view
Wall height 20 mm
Wall height 50 mm
Wall height 100 mm
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