Power Components; Power Bay - Silicon Graphics Origin 3900 User Manual

9.

Power Bay

007-4653-001
Chapter 9

Power Components

The Origin 3900 server uses the following power components: power distribution units
(PDUs), power distribution strips (PDSs), and power bays. This chapter describes the
function and physical aspects of these power components in the following sections:
• "Power Bay" on page 147
• "Power Distribution Unit (PDU)" on page 153
• "Power Distribution Strip (PDS)" on page 154
The power bay, which is a 3U-high enclosure, can monitor, control, and supply AC power
to as many as six hot-swappable distributed power supplies (DPSs). The number of
power supplies depends on the rack type. For example, in an I/O rack, the power bay
has four power supplies. In racks that house Cx-bricks and/or R-bricks, the power bay
has six power supplies.
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 six DPSs, the DPSs are bused together to provide approximately 5,380 W of
48-VDC power and 282 W of 12-VDC power.
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