Chapter 3 – Installation
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Enclosures
The systems are designed for installation within a clean and dry enclosure for both ordi-
nary 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.
Warning
The optional floppy disk/keyboard port access door must be closed and
latched at all times in order to maintain a proper seal against the intru-
sion of water and dust.
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 spe-
cific 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 9460/9462 systems do not have a power switch. The amount of input power required
by these systems 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 ca-
ble 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 con-
tacts 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 respon-
sibility 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.
