StorageTek L700 - Manual (Page 17)

96047 First Edition 1-1
1 General Information
This chapter contains an introduction about the uninterruptible power supplies
for StorageTek’s L180 and L700 Tape Libraries.
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Introduction
StorageTek and American Power Conversion (APC) offer an internal
uninterruptible power supply (UPS) with full AC redundancy for protecting
StorageTek’s L180 and L700 Tape Libraries. The UPS is an optional feature that
allows these tape libraries to maintain continuous operation in the event of a
power disruption. The UPS also eases the effects of blackouts, brownouts, sags
and surges in AC power.
The optional feature consists of two uninterruptible power supplies, an
Ethernet interface, a redundant switch, and a power outlet strip.
• The two power supplies supplement customer utility power during a
blackout and provide conditioning by filtering out small fluctuations and
disturbances or disruptions in the AC line voltage.
• The Ethernet interface allows you to monitor the status of each UPS.
• The switch (also called the redundant switch) alternates between the two
UPS units to provide continuous power to the library.
• The outlet strip allows you to connect up to eight additional components to
the UPS.
Note: This feature is capable of mounting internally in the rack space of each
library.
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What it Does
If an AC power failure occurs, it causes the switch to automatically transfer the
load from the customers power source to the UPS without interruption to the
tape library. If the UPS battery fails or is discharged, the switch automatically
transfers the load to the redundant UPS without interruption. This dual UPS
configuration will supply power to the equipment until the customers power is
restored or the batteries are discharged.
While running on battery power, periodic beeps will sound; this is normal.
Press the
TEST button to turn off this alarm. If you hear a continuous beep, you
have two minutes before the UPS will shutdown.