Power Switch - Xycom KPM Series User Manual

KPM(T) Series Flat Panel Industrial Monitor
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The systems are designed for installation within a clean and dry enclosure for both
ordinary and Hazardous Locations. The front panel meets the requirements of UL and
CSA Type 4, 4X, and 12 enclosures. The enclosure used for Class I Hazardous
Locations should have a minimum rating of Type 12 (NEMA 12, IP 5X). However,
Type 4 (IP 6X) enclosures are strongly recommended.
Panel flatness and rigidity are important if a proper panel seal is to be maintained. If
non-metal type enclosures, such as plastic or fiberglass, are to be used, install a rigid
metal stiffener behind the front panel. Failure to do so may result in an inadequate
panel seal due to flexure of the front panel material between the stud mounts. Tighten
the nuts on the mounting studs to 25 inch-pounds.
The requirements for enclosure fittings, conduit, and wiring vary according to the
specific rating of the location and the type of flammable or combustible material
involved. Those requirements are beyond the scope of this document and it is the
responsibility of the customer to ensure that the installation is compliant with codes
and regulations that apply to their specific location. Refer to NFPA 70, Article 500
for specific regulations in the United States.
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The KPM(T) monitors do not have a power switch. The amount of input power
required by these systems classifies a power switch as an incendiary device because
the voltage and current across the make/break device are capable of creating a spark.
Hazardous locations' regulations require that a power switch rated for ordinary
locations may be used if it is located in an area specified as non-hazardous. However,
limits in cable length between the workstation and the power switch may apply.
Otherwise the switch must be compliant with Class I, Division 1 requirements
(intrinsically safe). These switches are built in a manner that prevents the possibility
of a spark when contacts are made or broken.
Use suitable UL listed and/or CSA Certified Class I, Division 1 switches in
Hazardous Locations. These switches are available from a wide number of sources. It
is the responsibility of the customer to ensure that the power switch selected for their
installation has the correct Hazardous Locations rating for the location in which it is
installed.
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Chapter 2 – Installation
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