Device Description HG G-71915ZA | English, Revision 01 | Date: 09.09.2021
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Chapter 7 – Mounting
7.3.3 Minimum Distance Between Identical Transponder Antennas
Two or more transponder antennas operating at the frequencies 128/64 kHz must
maintain a minimum distance from each other in order not to interfere with each
other. The minimum distance between two HG G-71915ZA transponder antennas is
1500 mm.
If you suspect that magnetic fields are transmitted via the chassis construction:
If in doubt, carry out tests before assembly.
7.3.4 Metal-free Areas Around Transponder and Antenna
Metal in the vicinity of the transponder and antenna affects the accuracy and range
of the reading system. A distinction is made between:
1.
Smaller metallic structures that do not form a loop.
2.
Closed metallic structures or smaller metallic structures that form loops.
The following minimum distances apply.
7.3.4.1 Smaller Metallic Structures that do not Form a Loop
Around the antenna, smaller metallic structures that do not form loops may violate
the metal-free space. They must have a minimum distance of 50 mm.
Figure 9
Metal-free space around the antenna with smaller metallic structures, top view
Metal-free area
100 mm
100 mm
100 mm
100 mm
50 mm
50 mm
50 mm
50 mm
Example: Metal strut
Example:
Metal plate
Antenna
Direction of travel
