Power Supply/System Cooling Modules - EMC CLARiiON DAE2P Hardware Reference Manual

Drive carrier

Power supply/system cooling modules

Drive modules are extremely sensitive electronic components. Refer to the
instructions on "Handling FRUs"
The disk drive carriers are metal and plastic assemblies that provide
smooth, reliable contact with the enclosure slot guides and midplane
connectors. Each carrier has a handle with a latch and spring clips.
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.
The power supply/system cooling (power/cooling) modules are
located above and below 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. Each supply
supports a fully configured DAE2P/DAE3P 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 DAE2P/DAE3P will go off line within two
minutes.
Each power/cooling module has three visible status lights. The green
LED indicates power to the supply; the center LED indicates a power
supply fault. The remaining LED indicates a failure in one of the
integrated blowers within that module.
The status lights are shown in
"Monitoring disk enclosure status"
About DAE2P and DAE3P disk enclosures
whenever you handle a disk module.
Figure 1-9 and described in
in Chapter 3.
Power supply/system cooling modules
1-11