Site Environment; Site Considerations; Power Supply Considerations - Cisco 4200 Series Hardware Installation Manual

Installation Preparation
voltages. To properly guard against ESD damage and shocks, the wrist strap and cord must operate effectively.
If no wrist strap is available, ground yourself by touching the metal part of the chassis.
For safety, periodically check the resistance value of the antistatic strap, which should be between one and
10 megohms.

Site Environment

See
To avoid equipment failures and reduce the possibility of environmentally caused shutdowns, plan the site
layout and equipment locations carefully. If you are currently experiencing shutdowns or unusually high error
rates with your existing equipment, these considerations may help you isolate the cause of failures and prevent
future problems.

Site Considerations

Considering the following helps you plan an acceptable operating environment for the chassis, and avoid
environmentally-caused equipment failures.
• Electrical equipment generates heat. Ambient air temperature might not be adequate to cool equipment
• Ensure that the chassis cover is secure. The chassis is designed to allow cooling air to flow effectively
• Always follow ESD prevention procedures to avoid damage to equipment. Damage from static discharge

Power Supply Considerations

See Power Supply Module, on page 27
When installing the chassis, consider the following:
• Check the power at the site before installing the chassis to ensure that it is free of spikes and noise. Install
• Install proper grounding for the site to avoid damage from lightning and power surges.
• The chassis does not have a user-selectable operating range. Refer to the label on the chassis for the
• Several styles of AC-input power supply cords are available for the chassis; make sure that you have the
• If you are using dual redundant (1+1) power supplies, we recommend that you use independent electrical
Hardware Specifications, on page 35
to acceptable operating temperatures without adequate circulation. Make sure that the room in which
you operate your system has adequate air circulation.
within it. An open chassis allows air leaks, which may interrupt and redirect the flow of cooling air from
the internal components.
can cause immediate or intermittent equipment failure.
a power conditioner, if necessary, to ensure proper voltages and power levels in the appliance-input
voltage.
correct appliance input-power requirement.
correct style for your site.
circuits for each power supply.
for information about physical specifications.
for more detailed information about the power supply in the chassis.
Cisco Secure Firewall 4200 Series Hardware Installation Guide
Site Environment
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