User`s guide

1.3.6 Power Supply SBBs
Note
The BA35X–HA power supply is not supported in the SW300 enclosure.
The power supply SBB (BA35X–HD), shown in Figure 1–5, converts ac input
from the ac power entry controller to +5 V dc and +12 V dc for use by the SW300
components. The SW300 enclosure provides connections for up to eight power
supply SBBs. A minimum of four operable power supply SBBs is required for
system operation.
The SW300 enclosure is designed for 4+1 redundant power supply. In this
configuration, the four power supply SBBs on power supply bus A are provided
with additional redundancy by the power supply SBB located in the top shelf
of power supply bus B. This power supply SBB is connected to the black power
cord. Power is provided to the SW300 enclosure until such time as there are less
than four operating power supply SBBs. If this condition is reached, the SW300
enclosure will be held in a reset state.
With 4+4 full redundant power supplies, the SW300 enclosure can sustain
multiple power supply faults. When 4+4 full redundant power supplies are
used, input power may be connected to two separate utility power grids. In
this configuration, the power supply SBBs on power supply bus A are connected
to black power cords. The power supply SBBs on power supply bus B are
connected to grey power cords. See Chapter 3 for further discussion of power
configurations.
Figure 1–5 3½-Inch Power Supply SBB
COMMON POWER
SUPPLY STATUS
LED (GREEN)
POWER SUPPLY
STATUS LED
(GREEN)
CXO-4325A-PH
1–10 Introduction to the SW300 Enclosure