Power Supply/System Cooling Modules
1-9
About DAE2 Disk Enclosures
The latch holds the disk module in place to ensure proper connection
with the midplane. Disk drive Activity/Fault LEDs are integrated
into the carrier.
Power Supply/System Cooling Modules
The power supply/system cooling (power/cooling) modules are
located above the LCCs. The units integrate independent power
supply and dual-blower cooling assemblies into a single module.
Each power supply is an auto-ranging, power-factor-corrected,
multi-output, off-line converter with its own line cord and on/off
switch. Each supply supports a fully configured DAE2 and shares
load currents with the other supply. The drives and LCC have
individual soft-start switches that protect the disk drives and LCCs if
you install them while the disk enclosure is powered up. A FRU
(disk, LCC, or power/cooling module) with power-related faults will
not adversely affect the operation of any other FRU.
The enclosure cooling system includes two dual-blower modules. If
one blower fails, the others will speed up to compensate. If two
blowers in a system (both in one power/cooling module, or one in
each module) fail, the DAE2 will go off line within two minutes.
Each power/cooling module has three visible status lights. The
rightmost LED indicates power to the supply; the LED adjacent to it
indicates a power supply fault. The leftmost LED indicates a failure
in one of the integrated blowers within that module that cool the disk
enclosure. The status lights are shown in Figure 1-8 and described in
Monitoring Disk Enclosure Status in Chapter 3.
Figure 1-8 Power Supply/System Cooling Module
A latch on the power/cooling module locks it into place to ensure
proper connection to the midplane. You can add or remove one
EMC216
Power Switch
ac
Connector
Latch
Power
LED
(Green)
Power Fault
LED (Amber)
Blower Fault
LED
(Amber)
