Chapter Three - Installation
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Do not select a location near equipment that generates excessive electromagnetic in-
terference (EMI) or radio frequency interface (RFI) (equipment such as high power
welding machines, induction heating equipment and large motor starters).
•
Place incoming power line devices (such as isolation or constant voltage transform-
ers, local power disconnects, and surge suppressers) away from the unit.
•
The proper location of incoming line devices keeps power wire runs as short as pos-
sible and minimizes electrical noise transmitted to the unit.
•
Make sure the location does not exceed the unit’s shock, vibration, and temperature
specifications.
•
Install in the panel in such a way as to ensure that it does not cause a hazard from
uneven mechanical loading.
•
Avoid overloading the supply circuit
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 for 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 floppy disk/keyboard port access door must be closed and latched at
all times to maintain a proper seal against water and dust.
Panel flatness and rigidity are important to maintain a proper panel seal. If you are using
non-metal type enclosures, such as plastic or fiberglass, install a rigid metal stiffener be-
hind the front panel. Failure to do so may result in an inadequate panel seal due to flex-
ure of the front panel material between the stud mounts. Tighten the nuts on the mount-
ing 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.
System Power
On the average, the temperature within the system is 7-10°C higher than that outside the
enclosure. When the ambient (exterior) temperature reaches 42°C, the system’s power
supply will begin to derate at a rate of 3.25 watts per increase of 1°C.
The unit is rated to work at temperatures up to 50°C (at 50ºC, no more than 100 watts of
expansion can be added to the system).
Refer to the table below for more information.