Cisco Firepower 9300 - Power Supply Considerations; Rack Configuration Considerations

• 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 the ESD-prevention procedures described previously to avoid damage to equipment.
Damage from static discharge can cause immediate or intermittent equipment failure.
Power Supply Considerations
See Power Supply Modules, on page 26 for more detailed information about the power supply modules in
the Firepower 9300 .
When installing the chassis, consider the following:
• Check the power at the site before installing the chassis to ensure that it is “clean” (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.
• Install an uninterruptible power source for your site, if possible.
• If you are using dual redundant (1+1) power supplies, we recommend that you use independent electrical
circuits for each power supply.
Rack Configuration Considerations
See Rack-Mount the Chassis, on page 52 for the procedure for rack-mounting the chassis.
Consider the following when planning a rack configuration:
• Standard 19-in. (48.3 cm) 4-post EIA rack with mounting rails that conform to English universal hole
spacing according to section 1 of ANSI/EIA-310-D-1992.
• The rack-mounting posts need to be 2 to 3.5 mm thick to work with the slide rail rack mounting.
• If you are mounting a chassis in an open rack, make sure that the rack frame does not block the intake
or exhaust ports.
• If your rack includes closing front and rear doors, the doors must have 65 percent open perforated area
evenly distributed from top to bottom to permit adequate airflow.
• 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.
Cisco Firepower 9300 Hardware Installation Guide
48
Installation Preparation
Power Supply Considerations