APC SGI 15000 RAID - Manual (Page 111)

Drive Enclosure
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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)