Xycom 3510T, Manual

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Chapter Three - Installation
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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 intrusion 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
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 3500 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 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.
Communication Cable Interface
All communication cables should include a chassis ground shield. This shield should
include both copper braid and aluminum foil. The D-sub style connector housing
should be a metal conductive type (e.g., molded zinc) and the ground shield braid
should be well terminated directly to the connector housing. Do not use a shield
drain wire.
The outer diameter of the cable must be suited to the inner diameter of the cable
connector strain relief in order to ensure that a reliable degree of strain relief is
maintained. Always secure the D-Sub connectors to the workstation mating
connectors via the two screws located on both sides.