4600 Series Flat Panel Industrial PC
Chapter 2 – Installation
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144732 (C)
Enclosures
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 their installation is compliant with
codes and regulations that apply to their specific location. Reference NFPA 70,
Article 500 for specific regulations in the United States.
Power Switch
The 4600 series does not have a power switch. The amount of input power
required by this system classifies the 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.
Cable Connections
Division 2 Hazardous Location regulations require that all cable connections be
provided with adequate strain-relief and positive interlock. Never connect or
disconnect a cable while power is applied at either end of the cable.
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