LaCie 12big Rack Network
System Overview
User Manual
page 13
1.7. Power Supply Unit
AC-DC Power is provided by two dual-redundant power supply units
with specific load capability, mechanical packaging and a power
cage with output loom to suit this application.
A Power Supply Mounting Cage is fitted in the rear of the enclosure
as part of the subsystem core product. The cage houses two indi-
vidually hot pluggable 850W AC Power Supply Units (PSUs), each
with its own IEC inlet connector and failure indicator.
PSU voltage operating ranges are nominally 100V - 240V AC, se-
lected automatically. A typical PSU is shown in
Fig. 07
.
Each PSU incorporate an Audible Alarm to indicate when a fault
state is present and a bi-color (Green/Red) LED which indicates the
PSU status.
1.7.1. Multiple Power Supply Units
The LaCie 12big Rack Network includes two PSUs fitted in the Pow-
er Supply Mounting Cage, providing dual power sources for the sys-
tem so that if one PSU fails the other maintains the power supply and
enclosure operation is not affected while you replace the faulty unit.
PSU replacement should only take a few minutes to perform but
must be completed within 10 minutes from removal of the failed
PSU.
Fig. 07 - Power Supply Unit
