Rockwell Automation System Design for the Control of Electrical Noise - Manual (Page 11)

Publication GMC-RM001A-EN-P — July 2001
Chapter
1
Electrical Noise Control Overview
Chapter Objectives This chapter provides a brief understanding of the need for electrical
noise control, how noise affects system performance, noise coupling
methods and solutions. This chapter covers the following topics:
• What is electrical noise
• Understanding the need for electrical noise control
• Noise control basics
• Coupling mechanisms
• Solutions for reducing noise
• Implementation
• Measuring effectiveness
What is Electrical Noise? Electrical noise is voltage spikes, generated by the routine operation
of selected system components (sources), that interfere (due to a
coupling mechanism) with the routine operation of other selected
system components (victims).
Understanding the Need for
Electrical Noise Control In Europe, a system must satisfy EMC regulations. It must also work
reliably without suffering from noise-induced failures.
CE Compliance
Most equipment is CE marked. This means it is certified to be
compliant with European Directives which comprise two main
requirements:
• Potential noise sources must be limited in noise output to a
specified level.
• Potential victims of noise must be hardened to withstand a higher
noise level.