Understanding The Power Supplies - Cisco IPS 7.1 Installation Manual

Removing and Installing the Power Supply
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Understanding the Power Supplies

The IPS 4345 ships with one fixed fan and one fixed power supply (AC or DC) installed. The IPS 4360
ships with one power supply (AC or DC) installed. You can add an additional power supply or you can
order the IPS 4360 with two power supplies installed. Having two power supplies installed provides a
redundant power option. This configuration ensures that if one power supply fails, the other power
supply assumes the full load until the failed power supply is replaced. To maintain airflow, an empty bay
must be covered or both bays must be populated with power supplies. If only one power supply is
installed, make sure that it is installed in slot 0 (left slot) and that slot 1 (right slot) is covered with a slot
cover. If only one power supply is installed, do not remove the power supply unless the appliance has
been powered off. Removing the only operational power supply causes an immediate power loss.
The IPS 4360 can support two AC or two DC power supplies. Do not mix AC and DC power supply units
Note
in the same chassis.
The power supplies each provide 400 W of output power and are used in a 1 + 1 redundant configuration.
There is no input switch on the faceplate of the power supplies. The power supply is switched from
Standby to ON by way of a system chassis STANDBY/ON switch. The power supply slot numbers are
on the back of the chassis to the left side of each power supply. When facing the back of the chassis,
power supply slot 0 (PS0) is to the left and power supply slot 1(PS1) is to the right. By default, the
factory installs a single power supply in slot 0.
The appliance supports the following power supplies:
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Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1
6-16
The sensor requires 10 seconds from the time it is placed into standby mode before the power state
can be updated and stored. This means any changes to the power state within the first 10 seconds of
entering standby mode (including the standby mode itself) will not be observed if AC power is
removed within that time.
AC power supply—Provides 400 watt output power with two DC voltage outputs: +12 V and +5 V.
The AC power supply operates between 85 and 264 VAC. The AC power supply current shares on
the 12 V output and is used in a dual hot pluggable configuration. The AC power supply consumes
a maximum of 471 W of input power.
DC power supply—Provides 400 watt output power with two DC voltage outputs: +12 V and +5.0
V. The power supply operates between –40.5 and –72 VDC. The DC power supply current shares on
the 12 V output and is used in a dual hot pluggable configuration. The DC power supply consumes
a maximum of 500 W of input power.
Chapter 6 Installing the IPS 4345 and IPS 4360
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