APC 15000 RAID User Manual

Page of 152
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 (
) 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 (
) 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)