could cause a malfunction or a fire. Electrical Appliance and Material Safety Law
prohibits the use of UL-certified cables (that have the "UL" or "CSA" shown on
the cord), not regulated with the subject law by showing "PSE" on the cord, for
any other electrical devices than products designated by CISCO.
Statement 1073—No User-Serviceable Parts
No user-serviceable parts inside. Do not open.
When you are installing a chassis, use the following guidelines:
l Ensure that there is adequate space around the chassis to allow for servicing and
for adequate airflow. The airflow in the chassis is from front to back.
To ensure proper airflow it is necessary to rack your chassis using rail kits.
Physically placing the units on top of one another or stacking without the
use of the rail kits blocks the air vents on top of the chassis, which could
result in overheating, higher fan speeds, and higher power consumption.
We recommend that you mount your chassis on rail kits when you are
installing them into the rack because these rails provide the minimal
spacing required between the chassis. No additional spacing between the
chassis is required when you mount them using rail kits.
l Ensure that the air-conditioning can keep the chassis at a temperature of 41 to
95°F (5 to 35°C).
l Ensure that the cabinet or rack meets the rack requirements.
l Ensure that the site power meets the power requirements listed in the
specification sheet for your appliance. If available, you can use a UPS to protect
against power failures.
Avoid UPS types that use ferroresonant technology. These UPS types can
become unstable with these systems, which can have substantial current
draw fluctuations from fluctuating data traffic patterns.
© 2021 Cisco Systems, Inc. and/or its affiliates. All rights reserved. - 63 -
Appendix A.Installation Preparation
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