Publication 2711P-UM001I-EN-P - December 2008 35
Installation Chapter 2
Both ultraviolet and infrared radiation can reduce the field life of any
electronic device. While the materials used in the terminal bezels
provide long field life, that life can be extended by proper installation.
Ultraviolet radiation from the sun causes all plastics to fade or yellow
and become brittle over time. Using an antiglare overlay, cat. no.
2711P-RGT12, will protect the front of the terminal from direct
exposure to UV radiation and greatly increase its field life.
When installing the high-bright display module in an environment
where the front of the terminal will be in direct sunlight during the
hottest part of the day and the external ambient temperature can
exceed 40 °C (104 °F), use the visor kit, cat. no. 2711P-RVT12. The
visor reduces the solar load on the front of the display and helps to
maintain internal temperatures within specification.
The high-bright display module has a built-in temperature sensor that
automatically reduces the backlight intensity if the temperature inside
the cabinet exceeds 55 °C (131 °F). This reduces the risk of damage to
the display.
The paint color, size, and power dissipated by the internal
components of an enclosure affect the temperature rise inside the
cabinet. Hoffman, a Rockwell Automation Encompass Partner, has
information to assist you with enclosure selection and heating/cooling
accessories to meet the temperature requirements of the installed
equipment. See website http://www.hoffmanonline.com
.
Stirring fans or active cooling may be required in high altitude and
high ambient temperature locations to keep the internal enclosure
temperature below 55 °C (131 °F). Use a heater in installations where
the ambient temperature is below 0 °C (32 °F).
The backlight of the high-bright display generates a significant amount
of heat when set to full intensity. To minimize the amount of heat
generated and extend the life of the backlight, decrease the display
intensity by using the screen saver with a 5…10 minute delay.
Avoid placing the terminal on the south (north in the southern
hemisphere) or west side of the cabinet, if possible. This will reduce
the heat rise due to solar loading during the hottest part of the day.
Mount the terminal vertically to minimize solar loading on the display.
Do not mount the terminal in a sloped enclosure if it will be exposed
to direct sunlight.
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