Adaptec 1966600 User Guide - Page 27

Power Supply Units, Replacing a Power Supply Unit

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About the DuraStor Storage Subsystem Power Supply Units The DuraStor 312R storage enclosure has two independent hotswappable power supply units (PSU). See Figure 2-18. Each PSU has auto-sensing/load-sharing circuitry that balances the load between the power supplies. If a PSU fails, the load is transferred to the remaining good PSU without interruption of normal operation. Handle Power Supply On/Off Switch OGUOTOPUDT 1 0 FAULT Power Supply Status LEDs Power Cord Connector (with Security Bale) Retaining Latch Figure 2-18. DuraStor 312R Power Supply Unit Each PSU has a power switch, a power cord connector (with a security bale that fits over the power cord to prevent accidental disconnections), and an independent AC power cord. (The power switches are identified with a 1 for ON and a 0 for OFF.) If a failure occurs, the Power Supply LED on the front bezel changes from solid green to solid amber and the audible alarm sounds. On the failed PSU, the green Output Good LED goes out and the amber Fault LED lights up. See Replacing a Power Supply Unit on page 5-11 for information. 2-17

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2-17
About the DuraStor Storage Subsystem
Power Supply Units
The DuraStor 312R storage enclosure has two independent hot-
swappable power supply units (PSU). See
Figure 2-18
. Each PSU
has auto-sensing/load-sharing circuitry that balances the load
between the power supplies. If a PSU fails, the load is transferred
to the remaining good PSU without interruption of normal
operation.
Figure 2-18.
DuraStor 312R Power Supply Unit
Each PSU has a power switch, a power cord connector (with a
security bale that fits over the power cord to prevent accidental
disconnections), and an independent AC power cord. (The power
switches are identified with a 1 for
ON
and a 0 for
OFF
.)
If a failure occurs, the Power Supply LED on the front bezel
changes from solid green to solid amber and the audible alarm
sounds. On the failed PSU, the green Output Good LED goes out
and the amber Fault LED lights up.
See
Replacing a Power Supply Unit
on page 5-11
for information.
0
1
OUTPUT
GOOD
FAULT
Power Supply
On/Off Switch
Power Supply
Status LEDs
Retaining Latch
Handle
Power Cord Connector
(with Security Bale)