Download  Print this page

Propagation Of Electromagnetic Interference - Siemens SIMATIC Ident System Manual

Identification rfid systems.
Hide thumbs


Planning the RF300 system
4.5 Guidelines for electromagnetic compatibility (EMC)
● Route the signal cables as close as possible to chassis surfaces.
● Twist the feed and return conductors of separately installed cables.
● Routing HF cables:
avoid parallel routing of HF cables.
● Do not route cables through the antenna field.
Shielding for the cables
● Shield the data cables and connect the shield at both ends.
● Shield the analog cables and connect the shield at one end, e.g. on the drive unit.
● Always apply large-area connections between the cable shields and the shielding bus at
the cabinet inlet and make the contact with clamps.
● Feed the connected shield through to the module without interruption.
● Use braided shields, not foil shields.
Line and signal filter
● Use only line filters with metal housings
● Connect the filter housing to the cabinet chassis using a large-area low-HF-impedance
● Never fix the filter housing to a painted surface.
● Fix the filter at the control cabinet inlet or in the direction of the source.

Propagation of electromagnetic interference

Three components have to be present for interference to occur in a system:
● Interference source
● Coupling path
● Interference sink
Figure 4-11
If one of the components is missing, e.g. the coupling path between the interference source
and the interference sink, the interference sink is unaffected, even if the interference source
is transmitting a high level of noise.
Propagation of interference
System Manual, 07/2016, C79000-G8976-C345-0x


   Also See for Siemens SIMATIC Ident

   Related Manuals for Siemens SIMATIC Ident

This manual also for:

Simatic rf300

Comments to this Manuals

Symbols: 0
Latest comments: