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Chapter 3
Power Supply
Internal Disks
Fan Unit
3 - 6
The AC/DC power supply provides the following features and functions:
Provides 400 Watts @ +2.5 V, +3.3 V, and +12.0 V for switch
◆
operations. (Note that the power supply draws a total of 440W from the
AC power cord due to its operating efficiency.)
Uses remote sensing to maintain stable voltage and to account for any
◆
DC loss in cabling.
Provides an AC alarm to indicate when power is about to be removed
◆
from the system. When this alarm is activated, the power supply
maintains full regulated load for a minimum of 20 milliseconds, enabling
the system to shut down power gracefully.
The switch uses internal disk drives to store its software image,
configuration files, log files, and other maintenance-related data. The
ARX®1000 contains two redundant SATA drives, configured RAID1.
These drives are connected to the primary controller on the Application
Control Module (ACM). They are Field-Replaceable Units (FRUs);
procedures to swap a drive appear in a later chapter.
The internal fans are an environmentally-controlled cooling system. The
ACM is connected to the fan unit for temperature control and status
monitoring at 60-second intervals.
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