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NEMA Publishes Two New Annexes for its Control Circuit and Pilot Devices Standard
December 4, 2002 |Estimated reading time: Less than a minute
Rosslyn, Va. -- NEMA, the National Electrical Manufacturers Association, has released two new annexes to supersede annexes B and E in ICS 5-2000, "Industrial Control and Systems: Control Circuit and Pilot Devices."
ICS 5 provides general requirements for control circuit and pilot devices used in industrial applications for control-circuit switching and the control of solenoids. It covers the requirements for control relays, limit switches, proximity switches, pushbuttons, selector switches, indicating and pushbutton stations.
ICS 5, Annex B-2002, "Typical Proximity Switch Specifications," contains specifications that represent common dimensions and operating characteristics for proximity switches. It focuses only on inductive cylindrical proximity switches with threaded barrel, type I-A.
ICS 5, Annex E-2002, "Additional Requirements for Proximity Switches Suitable for Use in Strong Magnetic Fields," gives performance and test conditions for proximity switches such as electric weld fields (normally alternating) or electrolytic fields (normally constant).
NEMA is the leading trade association in the United States representing the interests of electroindustry manufacturers. For more information, visit www.nema.org.