Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 95

Figure 1-23 Power Distribution System in the Cisco 12008
Backplane
Minimum power supply configuration: One AC-input power supply or one DC-input power supply
Maximum power supply configuration: Two AC-input power supplies or two DC-input power supplies
Power Distribution System in the Cisco 12008
RP
Ð48 VDC
DC/DC
converter
+5.2 VDC
MBus
module
Line cards
Ð48 VDC
DC/DC
converter
+5.2 VDC
MBus
module
CSC card(s)
Ð48 VDC
DC/DC
converter
+5.2 VDC
MBus
module
SFC cards
Ð48 VDC
DC/DC
converter
+5.2 VDC
MBus
module
+5.2 VDC
AC or DC
power
Ð48 VDC
supply(ies)
+5 VDC
+3.3 VDC
+5 VDC
+3.3 VDC
+3.3 VDC
+24 VDC
Backplane
+3.3 VDC
Source voltage
AC-input power supply
(180 VAC to 264 VAC)
Source voltage
DC-input power supply
(Ð48 VDC to Ð60 VDC)
Product Overview 1-73
Power supply
fan tray
Card cage
fan tray
or