Apc SGI 15000 RAID User Manual Page 111

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Drive Enclosure
007-5510-002 97
5.2.1 Enclosure Chassis
The chassis assembly contains 60 drive bays at the front, each of which accommodates a plug-in drive
carrier module. The 60 drive bays are arranged in five rows of twelve drives (5x12). At the rear, the
chassis assembly contains two (2) PCMs and two (2) I/O modules.
The chassis is fitted with 19-inch rack mounting features which enables it to be fitted to four (4) 19-inch
racks and uses four (4) EIA units of rack space.
5.3 The Plug-in Modules
A drive enclosure requires the following modules for normal operation:
Power Cooling Module (PCM)
Input/Output Module (I/O)
Drive Carrier Module
Drive Expander Module (DEM)
5.3.1 Power Cooling Module (PCM)
Two (2) auto ranging AC 1865W Power Cooling modules (Figure 5–4) are supplied already mounted in
the rear of the enclosure as part of the subsystem core product.
.
The drive enclosure must always be operated with two Power Cooling Modules fitted (2 PCMs).
Module replacement should only take a few minutes to perform but must be completed within 10
minutes from removal of the failed module. Four (4) LEDs mounted on the PCM (Table 5–1) indicate
the status of the PCM and the fans. PCM voltage operating ranges are nominally 200V to 240V AC.
.
Figure 5–4 Power Cooling Module (1)
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