Extreme Networks ExtremeSwitching VDX 6740, Hardware Installation Manual

Page: 26 / 135

Environmental precautions
For successful installation and operation of the device, ensure that the following environmental requirements are met:
• Fans supplied with the device move air either front to back (exhaust) or back to front (intake). Be sure to align the device with the
airflow pattern of any other devices in the rack. All equipment in the rack should force air in the same direction to avoid intake of
exhaust air.
CAUTION
Ensure that the airflow direction of the power supply unit matches that of the installed fan tray. The power supplies
and fan trays are clearly labeled with either a green arrow with an "E", or an orange arrow with an "I."
• Ensure that the airflow available at intake vents allows the maximum airflow as specified in the product Technical Specifications.
• Ensure that the ambient air temperature does not exceed that specified for maximum operational temperate in the product
Technical Specifications.
EIA rack considerations
For successful installation and operation of the device in a rack, ensure the following rack requirements are met:
• The rack must be a standard EIA rack.
• For 1U devices, the rack space required is one rack unit (1U) 44.45 mm (1.75 in.) high and 440 mm (17.5 in.) wide.
• The equipment in the rack is grounded through a reliable branch circuit connection and maintains ground at all times. Do not
rely on a secondary connection to a branch circuit, such as a power strip.
• Ensure that the rack mounting does not impede airflow or negatively affect temperature requirements, particularly if the device
is installed in a closed or multirack assembly. Ensure that airflow openings on the port and nonport side of the device are not
obstructed.
CAUTION
Make sure the airflow around the front, and back of the device is not
restricted.
• The additional weight of the device does not exceed the rack’s weight limits or unbalance the rack in any way.
• The rack is secured to ensure stability in case of unexpected movement, such as an earthquake.
DANGER
Make sure the rack housing the device is adequately secured to prevent it from becoming unstable or falling over.
Recommendations for cable management
The minimum radius to which a 50-micron cable can be bent under full tensile load is 5.1 cm (2 in.). For a cable under no tensile load,
that minimum is 3.0 cm (1.2 in.).
Cables can be organized and managed in a variety of ways; for example, use cable channels on the sides of the EIA rack or patch panels
to reduce the potential for tangling the cables. The following list provides some recommendations for cable management:
Installation and safety considerations
ExtremeSwitching VDX 6740 Hardware Installation Guide
26 9036108-00