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Introduction
Power Distribution System
The SmartSwitch 9000 uses a distributed DC power system (Figure 1-2) similar to
those used in super computers. Three separate power buses are used to distribute
DC power. The 48 volt DC System Power Bus, located on the backplane, powers
all modules and the system cooling fans. The Diagnostic Power Bus provides 5
volts DC to all of the system's diagnostic controllers and the environmental
module. The INB termination power bus provides 3.3 volts DC to the
SmartSwitch 9000 9C614 INB termination modules.
57 volts
DC/DC
CONVERTOR
1-4
36 - 72 volts
DC Power Supply
5 volts
3.3 volts
48 Volt System Power Bus
5 Volt Diagnostic Power Bus
3.3 Volt INB Termination Power Bus
Diagnostic
Controller
Communications
Systems Components
Figure 1-2. Distributed DC Power Distribution System
36 - 72 volts
DC Power Supply
57 volts
5 volts
3.3 volts
Diagnostic
DC/DC
Controller
CONVERTOR
Communications
Systems Components
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