Chapter 3 Installing the Switch
Installation Guidelines
3-6
User Guide for the Catalyst Express 520 Switches
OL-12761-02
• The heat sinks and the bottom of the Catalyst Express 520-8PC-K9 switch
might be hot to the touch if the switch is operating at its maximum
temperature 113°F (45°C) and is in an environment that exceeds normal room
temperature (such as in a closet, in a cabinet, or in a closed or multirack
assembly).
• Airflow around the switch and through the vents is unrestricted.
Note We strongly recommend that you allow at least 3 inches (7.6 cm) of
clearance around the ventilation openings to prevent airflow
restriction and overheating.
• Do not stack switches or place switches side-by-side unless they are
separated on all sides by at least 3 inches (7.6 cm) of clearance from each
other.
• Do not place any items on the top of the switch.
• Allow at least 1.75 inches (4 cm) of clearance above each switch in the rack.
• Do not wall-mount the switch with its front panel facing up or sideways.
According to safety regulations, wall-mount the switch with its front panel
facing down to prevent airflow restriction and to provide easier access to the
cables.
• Clearance to front and rear panels is such that
–
Airflow around the switch and through the vents is unrestricted.
–
Front-panel LEDs can be easily read.
–
Access to ports is sufficient for unrestricted cabling.
–
AC power cord can reach from the AC power outlet to the connector on
the switch rear panel.
• Cabling is away from sources of electrical noise, such as radios, power lines,
and fluorescent lighting fixtures.
• Cabling is safely away from other devices that might damage the cables.
For additional cabling guidelines, see the “Cabling Guidelines” section on
page A-10.
