User`s guide

1.3 Major Components
The major components of the SW300 enclosure are shown in Figure 1–2.
Figure 1–2 SW300 Components (Cabinet Removed for Clarity)
CXO-4305A-MC
POWER
SUPPLY SBB
STORAGE
DEVICE SBB
AC POWER
ENTRY
CONTROLLER A
AC POWER
ENTRY
CONTROLLER B
HS ARRAY
CONTROLLER
DUAL-SPEED
BLOWER
POWER A
POWER B
ENVIRONMENTAL
MONITOR UNIT
1.3.1 AC Power Entry Controller
The two ac power entry controllers provide the system on/off switch, ac power to
all power supply SBBs, noise filtering, surge suppression, and electromagnetic
interference (EMI) filtering.
In the SW300 enclosure, an auxiliary ac power source and a second ac power
entry controller supply ac power to a second power supply SBB in each shelf.
If the primary ac power source or ac power entry controller A fails, the shelf
1–4 Introduction to the SW300 Enclosure