User's Manual

EMC Directives
4 – 2 D101583 0207 BL ident
For whom are the EMC directives intended?
These EMC directives are intended for:
 Project engineers and planners who are planning the system
with the RFID modules to be configured.
 Installation personnel, service technicians and engineers, who
use this description to correctly lay the connection cables or
have to remedy the existing problems during a malfunction.
In this chapter you will learn more about the EMC guidelines,
particularly:
 Dispersion of electromagnetic interference
 What does EMC mean?
 Fundamentals for EMC protection
 Installation in a switch cabinet
 Avoiding sources of interference
 Potential equalisation
 Shielding the cable
Dispersion of electromagnetic interference
In a system or installation electromagnetic interference can only occur
if the following components are mutually present:
 Source of interference
 Interference path
 Susceptible equipment.
If one of these components is not present (for example the
interference path), no interference will occur even if the source of
interference sends high levels of interference (Fig. 1):
Figure 1
Interference
components
source of interference
e.g. motor
susceptible equipment
e.g. read/write head
link
e.g. cable connector