Chapter 3: Overview Of Power Supplies; Ac Power Supply - Extreme Networks BlackDiamond X8 Series Hardware Installation Manual

3
Overview of Power Supplies

AC Power Supply

The switch is powered by AC power supplies that are installed at the top front of the chassis.
Warning
Field operators must not attempt to open the power supply enclosure for any reason; the
power supply does not contain user-serviceable parts. In the event of failure, return the
defective power supply to Extreme Networks for repair or replacement.
The power supply bay in the switch can accommodate up to eight AC power supplies.
The switch AC power supplies can operate from 110 V AC or 220 V AC and automatically adjust to the
supply voltage. With 220 V AC input, the AC power supplies can operate in an N+N or N+1
configuration.
Power supplies in the switch are fully fault tolerant and load-sharing in an N+1 configuration. After the
system is properly configured, if one power supply fails, the others provide sufficient power to operate
a fully loaded switch.
AC Power Supply
The AC power supply for the switch delivers 2500 W when operated from 185 to 264 V AC, or 1250 W
when operated from 90 to 140 V AC.
Figure 10: BlackDiamond X8 AC Power supply
1 = LEDs
2 = Release button
Each AC PSU contains two cooling fans at the front of the unit. Airflow is from front to back.
3 = Inserter/extractor lever