Power Bay; Overview - Silicon Graphics SGI Altix 3700 Bx2 User Manual

9.

Overview

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Chapter 9

Power Bay

This chapter describes the function and physical components of the power bay in the
following sections:
• "Overview" on page 105
• "External Components" on page 107
• "Distributed Power Supplies" on page 109
• "Technical Specifications" on page 111
The power bay is a 3U-high enclosure that holds a maximum of six hot-swappable
distributed power supply modules (DPSs). The power bay monitors, controls, and
supplies AC power to the DPSs. Although the power bay can hold a maximum of six
DPSs, in this system the power bay contains three or five DPSs. The compute racks
require power bays with five DPSs and the I/O racks require power bays with three
DPSs.
Each DPS inputs single-phase AC voltage and outputs 950 W at 48 VDC and 42 W at 12
VDC. The outputs of the DPSs are bused together. For example, when the power bay
contains three DPSs, the DPSs are bused together to provide approximately 2,760 W of
48 VDC power and 135 W of 12 VDC power.
Figure 9-1 shows front and rear views of the power bay.
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