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Working with power supplies
There are no user-repairable components in the power supply. If a power
supply fails, the complete unit must be replaced. Do not disassemble a power
supply under any circumstances.
External power supplies such as a UPS, power plant, or batteries, may be
heavy and require special handling procedures and additional personnel for
unloading and installation. Also, be aware of weight distribution and keep the
equipment room floor from being overly stressed.
Handling circuit cards
Follow these precautions when handling circuit cards.
1
Unpack or handle cards away from electric motors, transformers, or
similar machinery.
2
Handle cards by the edges only. Do not touch the contacts or
components.
3
Set cards on a protective antistatic bag. If an antistatic bag is not
available, hand-hold the card, or set it in a card cage unseated from the
connectors.
4
Store cards in protective packing.
5
Do not stack cards on top of each other unless they are packaged.
6
Wear a properly connected antistatic wrist strap when you work on the
equipment. If a wrist strap is not available, regularly touch one of the
bare metal strips in the module to discharge static. Figure 17 on
shows the wrist strap connection points and the location of the bare metal
strips you should touch.
Preparing for installation
DANGER OF ELECTRIC SHOCK
To avoid the danger of electric shock, be careful
when working with power equipment and
connections.
Comply with all Warnings.
Large System Installation and Commissioning
Page 63 of 436
page 64
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