Chapter 5
5 - 6
Changing a power supply
The VIPRION platform can contain up to four power supplies. These power
supplies can operate in one of two modes: 120V and 220V, depending on
the power source to which the power supplies are connected.
The VIPRION platform supports both symmetric and asymmetric power
redundancy. Symmetric redundancy requires an even number of power
supplies, with half supplied by one power feed and half by another. If one
power feed fails, the system is unaffected because the remaining supplies
are sufficient for the entire load. With asymmetric redundancy (n + 1), it is
not possible to split the supplies evenly between the power feeds. As a
result, if one power feed fails, the whole system can go down. In either type
of redundancy, if a single power supply fails, the system is unaffected by the
loss of a single supply.
For details about power requirements, see AC power requirements, on page
9-2.
Adding a power supply
The platform can contain a total of four power supplies. By default, the
platform includes four power supplies, one installed in each power supply
bay.
You do not need special tools to replace a power supply.
To add a power supply
1. Using the indentations on either side of the LCD component, pull
the LCD component off the platform.
With the LCD component removed, you can see the power supplies
and the available power supply bays.
2. Slide the new power supply into the appropriate empty power
supply bay.
3. Lower the power supply eject lever to fully seat the power supply in
its bay.
4. Secure the power supply in its bay using the fastener attached to the
middle of the power supply eject lever.
5. Attach the power cord for the new power supply to the back of the
unit, using the corresponding power supply connector.
6. Replace the LCD component.
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