APC 15000 RAID manual Plug-in Modules, Enclosure Chassis, Power Cooling Module PCM

Drive Enclosure

5.2.1Enclosure 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)

5.3.1Power 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.

Figure 5–4Power Cooling Module (1)

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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.

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