User guide

Preparing to Install the Cisco 2500 Series Access Server 2-5
General Site Requirements
• When mounting a chassis in an open rack, ensure that the rack frame does not block the
intake or the exhaust ports. If the chassis is installed on slides, check the position of the
chassis when it is seated all the way into the rack.
• In an enclosed rack with a ventilation fan in the top, excessive heat generated by
equipment near the bottom of the rack can be drawn upward and into the intake ports of
the equipment above it in the rack.
• Baffles can help to isolate exhaust air from intake air, which also helps to draw cooling
air through the chassis. The best placement of the baffles depends on the airflow patterns
in the rack, which are found by experimenting with different arrangements.
Power Supply Considerations
Check the power at your site to ensure that you are receiving “clean” power (free of spikes
and noise). Install a power conditioner if necessary.
Warning The device is designed to work with TN power systems. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)
The access server power supply includes the following features:
• Autoselects either 110V or 220V operation.
• All units include a 6-foot (1.8-meter) electrical power cord. (A label near the power cord
indicates the correct voltage, frequency, current draw, and power dissipation for your
unit.)
Warning This product relies on the building’s installation for short-circuit (overcurrent)
protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S.
(240 VAC, 10A international) is used on the phase conductors (all current-carrying
conductors). (To see translated versions of this warning, refer to the appendix “Translated
Safety Warnings.”)