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4-2
Maintenance
3930 Service Delivery Switch
Hardware Installation and Start-up Manual
009-3223-001 Standard Revision E
Copyright
©
2012-2014 Ciena
®
Corporation
January 2014
AC Power Supplies
When redundant AC supplies are used, simply remove power from the supply
being replaced. Leave the other supply powered. The remaining AC supply
will be able to provide power to the system while the other power supply is
replaced.
See
“Replacing an AC Power Supply” on page 4-3
for a procedure.
DC Power Supplies
If the DC power supplies are powered off separate breakers, you will be able
to turn off power feeding the power supply that is being replaced. While the
second independent circuit remains on, and powers the unit during the
replacement process.
If the DC power supplies are both powered off the same breaker, the power
supply replacement will be a service impacting maintenance. As a result,
Ciena recommends that each DC power supply be connected to a separate
breaker.
See
“Replacing a DC Power Supply” on page 4-4
for a procedure.
Содержание 170-3930-900
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