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Prepare for Cisco x90 Series Content Security Appliances Installation
Site Environment
When planning the site layout and equipment locations, consider the information in the next section to
help avoid equipment failures and reduce the possibility of environmentally caused shutdowns. 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.
Power Supply Considerations
See the
supplies.
When installing the chassis, consider the following:
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Rack Requirements
This section provides the requirements for the standard open racks.
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Cisco x90 Series Content Security Appliances Installation and Maintenance Guide
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"Power Specifications" section on page A-3
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 appliance; 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.
The rack must be of the following type:
A standard 19-in. (48.3-cm) wide, 4-post EIA rack, with mounting posts that conform to English
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universal hole spacing, per section 1 of ANSI/EIA-310-D-1992.
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The rack post holes can be square 0.38-in. (9.6 mm), round 0.28-in. (7.1 mm), #12-24 UNC, or
#10-32 UNC when you use the supplied slide rails.
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For the Cisco C190, M190, S190, C390, M390, and S390 appliances, the minimum vertical rack
space per appliance must be 1 RU, equal to 1.75 in. (44.45 mm).
For the Cisco C690, M690, and S690 appliances, the minimum vertical rack space per appliance
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must be 2 RUs, equal to 3.5 in. (88.9 mm).
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.
Chapter 1
Install Cisco x90 Series Content Security Appliances
for more detailed information about the power
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