RF600 system planning
4.4 Minimum distances and maximum ranges
SIMATIC RF600
System Manual, 06/2019, J31069-D0171-U001-A22-7618
59
Effects due to transponder mounting
The maximum read/write range of the transponders depends on the material of the mounting
surface. The specified ranges apply when mounted on non-metallic surfaces, such as paper
or card, with the RF640L, RF642L, RF625T, RF630T, RF640T and RF645T when mounted
on metal.
Mounting on plastic can reduce the maximum read/write range considerably depending on
the type of plastic (up to 70%). When mounted on wood, the range is furhter reduced the
more moisture the wood contains. Due to the attenuating properties of glass, direct mounting
without a spacer can halve the range.
If the RF625T, RF630T, RF640T, RF645T, RF680T or RF682T transponders are mounted
on metal, this metallic surface acts as a reflection surface. This surface should therefore be
adequately large. To achieve the listed maximum ranges, transponders must be mounted on
a metallic mounting surface with a minimum diameter of 150 mm, for the RF630T and
RF680T 300 mm. If the metallic mounting surface only has a diameter of 65 mm instead of
the required 150 mm, the range is reduced by 65%.
4.4.3
Maximum read/write ranges of transponders
Maximum read ranges
The measurements were made under the following conditions:
●
ETSI radio profile
●
Maximum possible radiated power of the reader or antenna.
●
Optimum transponder alignment and mounting surface
●
With antenna connected:
–
With a 3 meter long antenna cable with 1 dB cable loss (article number: 6GT2815-
0BH30)
–
RF615A and RF620A: Mounted on metal.
–
RF680A: Circular polarization
●
Room temperature of approx. 20 - 25 °C
●
Low-reflection environment; Ranges may be smaller or larger depending on the ambient
conditions.
