Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
57
APPENDIX G
G – European Union EMC Directives
Electromagnetic Compatibility Guidelines
For Machine Design
This document provides background information about Electromagnetic Interference (EMI) and ma-
chine design guidelines for Electromagnetic Compatibility (EMC).
Introduction
Perhaps no other subject related to the installation of industrial electronic equipment is so misunder-
stood as electrical noise. The subject is complex and the theory easily fills a book. This section pro-
vides guidelines that can minimize noise problems.
The majority of installations do not exhibit noise problems. However, these filtering and shielding
guidelines are provided as counter measures. The grounding guidelines provided below are simply
good grounding practices. They should be followed in all installations.
Electrical noise has two characteristics: generation or emission of electromagnetic interference (EMI);
and response or immunity to EMI. The degree to which a device does not emit EMI, and is immune to
EMI is called the device’s Electromagnetic Compatibility (EMC).
Equipment, which is to be brought into the European Union legally, requires a specific level of EMC.
Since this applies when the equipment is brought into use, it is of considerable importance that a drive
system, as a component of a machine, be correctly installed.
“EMI Source-Victim Model” shows the commonly used EMI model. The model consists of an EMI
source, a coupling mechanism and an EMI victim. A device such as servo drives and computers,
which contain switching power supplies and microprocessors, are EMI sources. The mechanisms for
the coupling of energy between the source and victim are conduction and radiation. Victim equipment
can be any electromagnetic device that is adversely affected by the EMI coupled to it.
Immunity to EMI is primarily determined by equipment design, but how you wire and ground the device
is also critical to achieving EMI immunity. Therefore, it is important to select equipment that has been
designed and tested for industrial environments. The EMI standards for industrial equipment include
the EN61000-4-X series (IEC 1000-4-X and IEC8O1-X), EN55011 (CISPR11), ANSI C62 and C63 and
Figure 1- EMI Source-Victim Model
CONDUCTED EMI
EMI
SOURCE
EMI
VICTIM
EMI
VICTIM
RADIATED
EMI
Appendix G
Summary of Contents for Omega SMC9930
Page 73: ...Glentek Inc 208 Standard Street El Segundo California 90245 U S A 310 322 3026 73 Appendix K...
Page 75: ...Glentek Inc 208 Standard Street El Segundo California 90245 U S A 310 322 3026 75 Appendix K...
Page 77: ...Glentek Inc 208 Standard Street El Segundo California 90245 U S A 310 322 3026 77...
