Extreme Networks BlackDiamond 10808 Installation Manual page 54

The BlackDiamond 10K series switch includes two power supply controllers, located in the back of the
chassis, that collect data from the installed power supplies and report the results to the MSM modules
2
via an I C interface.
When the BlackDiamond 10K series switch is first powered on, the power supply controllers enable the
power supplies by providing 48V power. The power supply controller also detects and reports
incompatible combinations of power supply types and line voltage feeds and disables the power supply
if an unsafe condition arises.
Two power supply controllers installed in the BlackDiamond 10K series switch provide primary/
backup redundancy in case that one of the controllers fails or is removed. At least one power supply
controller must be installed.
Figure 17 shows the front panel of the power supply controller.
Module status LEDs
PoE power control port
with status LEDs
EX_018
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