Principles Of Installation Of Systems For Emc; Overview Of Possible Interference - Siemens S5-155U System Manual

Principles of Installation of Systems for EMC

3.1

Principles of Installation of Systems for EMC

What does EMC mean?
3.1.1
Overview of Possible
Interference
SINEC Bus System
Figure 3-1 Electromagnetic Interference with Programmable Controllers
3 - 4
Electromagnetic compatibility (EMC) is understood to mean the
capability of electrical equipment to operate correctly in a defined
electromagnetic environment, without being affected by the
environment and without affecting the environment to an unacceptable
degree.
All SIMATIC S5 products have been developed for applications in
harsh industrial environments and meet high requirements for EMC.
Before installing the control system, however, you should still carry
out EMC planning and involve possible interference sources in the
assessment.
Described in the following chapter are
• • the various paths over which interference can be picked up in the
PLC;
• • typical interference sources and their coupling mechanisms,
• • basic rules for ensuring EMC.
Electromagnetic interference can be picked up over different paths by
the programmable controller:
Fields
Programmable
Controller
Power Supply
Protective Conductor
I/O Signal Lines
System Manual
C79000-B8576-C199-03