Siemens SIMATIC MOBY D System Manual page 60

Planning the MOBY D system
4.3 Installation guidelines
● The metal parts in the immediate vicinity of the antenna must be grounded in a mesh with
● Since the write/read device is installed in a metal housing, and the antennas can couple
Notes on installing and laying the antenna cable
To suppress possible interference, an EMC hinged ferrite choke must be fitted to the
antenna cables (as well as the antenna cable between the SLG and the antenna duplexer).
The coaxial cable must be wound tightly at least four times through the EMC ring core. The
maximum distance between the connecting plug for the write/read device or the antenna
duplexer and the ring core must be 100 mm.
The antenna cable must always be run vertically from the antennas. A minimum distance of
200 mm to the antennas must be observed with further cable routing.
Otherwise, performance losses must be expected.
There must be a distance of at least 300 mm between antenna cables and parallel power
cables.
Unrequired cable length must be secured in a bundle with a diameter of 100 to 150 mm.
If the standard antenna cable is too short, it can be increased by 7.20 m with the extension.
Slight range losses must be expected here.
To achieve optimal read ranges, the antenna cable should not be shortened or lengthened.
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a good HF connection.
into the cables to the write/read device, it must be installed at a distance of at least 500
mm from the antennas.
System Manual, 01/2010, J31069-D0147-A6-7618
MOBY D