• Ensure that the chassis cover is secure. The chassis is designed to allow cooling air to flow effectively
within it. An open chassis allows air leaks, which may interrupt and redirect the flow of cooling air from
the internal components.
• Always follow ESD-prevention procedures to avoid damage to equipment. Damage from static discharge
can cause immediate or intermittent equipment failure.
Power Supply Considerations
See Power Supply, on page 14 for more detailed information about the power supply in the chassis.
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
a power conditioner, if necessary, to ensure proper voltages and power levels in the appliance-input
voltage.
• 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
correct appliance input-power requirement.
• Several styles of AC-input power supply cords are available for the chassis; make sure that you have the
correct style for your site.
• If you are using dual redundant (1+1) power supplies, we recommend that you use independent electrical
circuits for each power supply.
• Install an uninterruptible power source for your site, if possible.
Rack Configuration Considerations
See Rack-Mount the Chassis, on page 31 for the rack-mount procedure.
Consider the following when planning a rack configuration:
• If you are mounting a chassis in an open rack, make sure that the rack frame does not block the intake
or exhaust ports.
• Be sure enclosed racks have adequate ventilation. Make sure that the rack is not overly congested as each
chassis generates heat. An enclosed rack should have louvered sides and a fan to provide cooling air.
• In an enclosed rack with a ventilation fan in the top, 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. Ensure that
you provide adequate ventilation for equipment at the bottom of 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. Experiment with
different arrangements to position the baffles effectively.
Cisco Email Security Appliance C195, C395, C695, and C695F Hardware Installation Guide
29
Installation Preparation
Power Supply Considerations
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