1200-Watt DC-Input Power Supply Replacement Instructions 5
Installation Safety, ESD Precautions, and Tools Required
Figure 3
On/off Switch Locking Mechanism
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A captive installation screw at the bottom of the power supply front panel provides electrical
grounding and prevents the power supply from vibrating or sliding out of the bay and dislodging
from the power connectors in the backplane. (See Figure 2.)
The power supplies are self-monitoring. Each supply monitors its own temperature and internal
voltages. An internal fan in each power supply draws cooling air from the back of the chassis,
through the power supply, and out the front of the chassis. The power supply airflow is separate from
that of the rest of the chassis.
Installation Safety, ESD Precautions, and Tools Required
Before you begin this installation, review the safety guidelines in this section to avoid injuring
yourself or damaging the equipment. This section also provides power requirements to consider if
you are adding a second power supply to your system for redundant power, and lists of the tools and
parts you need to perform this installation.
Safety Guidelines
The following guidelines will help to ensure your safety and protect the equipment. This list is not
inclusive of all potentially hazardous situations, so be alert.
Warning
Two people are required to lift the chassis. Grasp the chassis underneath the lower edge
and lift with both hands. To prevent injury, keep your back straight and lift with your legs, not your
back. To prevent damage to the chassis and components, never attempt to lift the chassis with the
handles on the power supplies or on the interface processors, or by the plastic panels on the front of
the chassis. These handles were not designed to support the weight of the chassis. (To see translated
versions of this warning, refer to page 15.)
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Always disconnect all power cords and interface cables before moving the chassis.
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Keep tools and chassis components away from walk areas.
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Do not work alone if potentially hazardous conditions exist.
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Do not perform any action that creates a potential hazard to people or makes the equipment
unsafe.
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Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
H3031
0
I
Power
switch
Locking device