Allen-Bradley PanelView Plus 6 1000, Руководство пользователя, Страница: 27 / 168

Rockwell Automation Publication 2711P-UM006A-EN-P - November 2010 27
Install Terminal Chapter 2
Using an Antiglare Overlay
Ultraviolet (UV) radiation from the sun causes all plastics to fade or yellow, and
become brittle over time. Using an antiglare overlay, catalog number
2711P-RGT12, will protect the front of the terminal from direct exposure to UV
radiation and increase its field life.
Using a Solar Visor
If the high-bright display module will be in direct sunlight during the hottest part
of the day and the external ambient temperature exceeds 40 °C (104 °F), use the
visor kit, catalog number 2711P-RVT12. The visor reduces the solar load on the
front of the display and helps to maintain 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.
Selecting an Enclosure
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 help you select an enclosure,
and heating/cooling accessories to meet the temperature requirements of the
installed equipment. See
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).
Backlight Considerations
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.
Orientation of the Terminal
If outside, avoid placing the terminal on the south (north in the southern
hemisphere) or west side of 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 the solar loading on the display. Do
not mount the terminal in a sloped enclosure if it will be exposed to direct
sunlight.