Basic information
2 Basic information
2.1 Terms
Electromagnetic compatibility (EMC)
The ability of equipment or a system to function satisfactorily in its electromagnetic environment without introducing
impermissible electromagnetic interference to other equipment in the same environment.
2.2 Interference
Automation systems are generally affected by conducted and radiated electromagnetic interference in their oper-
ating locations.
These are then adjusted in test standards and tested for resistance to these disturbances during conformity testing
of the products.
Conducted interference via
•
Supply lines
•
Process wiring
•
Communication lines
•
Grounding
Radiated interference via
•
Openings in metal housings
•
Plastic housings (no shielding effect)
Automation system
Electromagnetic fields
Process wiringCommunication
Power supply Grounding
Figure 1: Interference
Installation / EMC guide 1.36 (April 2021) 5
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