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AcerAltos 19000 User’s Guide
1-6
1.1.5 Redundant Power Supply Subsystem
The system ships with two load-sharing power supply modules. Load sharing
significantly extends the life of the power supplies. The power subsystem also
supports a redundant configuration such that if one power supply fails, the other
continues to provide system power.
A third power supply module is available as an option. This power supply
module is redundant, but not load-sharing; however, if either the primary or
secondary power supply module fails, the third power supply module load
shares with the remaining power supply module.
An important segment of the power subsystem is the optional battery module.
Providing backup support to the power supply modules, the battery
automatically charges whenever the system is on. This gives a fully-configured
system the ability to run through short interruptions in wall power or to continue
supplying system power for up to eight minutes in the event of total AC power
failure.
1.1.6 Security
The system housing comes with mechanical security locks on both the front panel
and the side panels, preventing unauthorized access to the internal components.
The system BIOS secures the CMOS data and other system software with power-
on password, keyboard password, setup control, disk drive control, and monitor
control.