Installation guide

Network Infrastructure for EtherNet/IP™
7-89
Selecting Components
7.4.3 Electrical noise
Electrical noise is produced by motors, welders, and power-switching control devices, such as drives and
servo controls, RF wireless transmitters, incoming power lines, and a variety of other sources. The higher
data rates of Ethernet, especially fast Ethernet (100 Mbps), require greater attention to cabling issues and
equipment noise specifications. Equipment rated under the following standards should be considered for
electrically noisy environments:
• IEC 61000 (electromagnetic interference)
• IEC 61000-4-2 (electrostatic discharge)
• IEC 61000-4-3 (radiated noise immunity)
• IEC 61000-4-4 (noise burst)
• IEC 61000-4-5 (surge)
• IEC 61000-4-6 (conducted noise immunity)
• IEC 61000-4-8 (magnetic field immunity)
• IEC 61000-4-11 (voltage dips and interruptions)
It is important to remember when comparing specifications, that many of the above mentioned standards
specify different immunity levels or criteria ratings. Vendors are a good source for any additional criteria
that may apply.
7.4.4 Shock and Vibration
When mounting infrastructure components on or near vibrating machinery, such as punch or stamping
presses, etc., it is important to carefully review all shock and vibration specifications for all the
components. Equipment rated under the following standards should be considered for higher shock and
vibration environments:
• IEC 61131-2, IEC 60068-2-27 (shock)
• IEC 60068-2-6 (vibration)
7.4.4.1 Certifications
Typical certifications for industrial applications include CE, EN 60950, UL/cUL1950, and UL/cUL 508.
For use in potentially explosive environments in the United States, added certifications such as UL/cUL
1604 Class 1, Div. 2 (A, B, C, D) or FM 3611 Class 1, Div. 2 may be required. In Canada or Europe,
certification to a zone rating system may be required.