Installation manual

3 Understanding Power Supplies
Understanding PSU Redundancy in the BlackDiamond X series Chassis
AC Power Supply
The BlackDiamond X series 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.
Note
AC power supplies are ordered separately from the BlackDiamond X8 chassis.
The AC power supplies can operate from 110 VAC or 220 VAC and automatically adjust to the supply
voltage. With 220 VAC input, the AC power supplies can operate in an N+N or N+1 configuration.
Depending upon the load, with 110 VAC input the AC power supplies can operate in an N+N or N+1
configuration as well.
Power supplies in the BlackDiamond X series 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.
For more information on redundancy in the BlackDiamond X series chassis, see Understanding PSU
Redundancy in the BlackDiamond X series Chassis on page 29.
Understanding PSU Redundancy in the BlackDiamond X series
Chassis
This section describes how N+1 and N+N redundancy apply to the BlackDiamond X series PSUs (power
supply units). Extreme Networks sales personnel know exactly how much power should be allocated
for each module in a customer’s system and the maximum power output each PSU can deliver.
Extreme Networks sales personnel will determine how many PSUs are needed for each installation to
achieve the desired redundancy.
This section contains the following topics:
•
Power System Redundancy Overview on page 30
•
N+1 Redundancy on page 30
•
N+N Redundancy on page 30
•
Simultaneous N+1 and N+N Redundancy on page 30
BlackDiamond X Series Switches Hardware Installation Manual 29