Acer Network Device Altos R520 - Manual (Page 86)

3 System upgrade 76
Installing and removing a power
supply module
The server has two power supply module bays on the rear panel that
accept hot-plug power supply modules. The system ships out with only
a single power supply module installed. You have the option to
purchase an extra power supply module to provide the system with a
redundant power source. A redundant power configuration enables a
fully-configured system to continue running even if one power supply
module fails.
WARNING! To reduce the risk of personal injury or damage to
the equipment, the installation of power supply modules
should be referred to individuals who are qualified to service
server systems and are trained to deal with equipment capable
of generating hazardous energy levels.
WARNING! To reduce the risk of personal injury from hot
surfaces, observe the thermal labels on each power supply
module. You can also consider wearing protective gloves.
WARNING! To reduce the risk of personal injury from electric
shock hazards, do not open the power supply modules. There
are no serviceable parts inside the module.
Caution! Electrostatic discharge can damage electronic
components. Make sure that you are properly grounded before
handling a power supply module.
Caution! Due to chassis airflow disruption, a power supply bay
should never be vacant for more than two minutes when the
server is powered on. Exceeding five minutes might cause the
system to exceed the maximum acceptable temperature and
possibly damage the system components.
Caution! The power supply is only hot-pluggable if you have a
redundant system with two power supplies installed. If you
only have one power supply installed, before removing or
replacing the power supply, you must first take the server out
of service, turn off all peripheral devices connected to the
system, turn off the system by pressing the power button, and
unplug the AC power cord from the system or wall outlet.