Installation guide

BlackDiamond 20808 Switch Hardware Installation Guide

3 BlackDiamond 20808 Power Supplies

This chapter includes the following sections:

● Overview of the BlackDiamond 20808 Power Supplies on page 25

● AC Power Supply on page 25

● DC Power Supply on page 27

NOTE

For central DC power connections, the 1900 W DC PSU is intended to be installed only in restricted access

locations (for example, a dedicated equipment room, equipment closet, or central office) in accordance with Articles

110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA-70. All wiring methods involving the DC

input cable assembly must be performed according to the relevant articles of the National Electrical Code.

WARNING!

Field operators must not attempt to open the PSU enclosure for any reason; the PSU does not contain user-

serviceable parts. In the event of failure, return the defective PSU to Extreme Networks for repair or replacement.

Overview of the BlackDiamond 20808 Power Supplies

The BlackDiamond 20808 switch can be powered by either AC or DC power supplies (PSUs). Power

supplies in the BlackDiamond 20808 switch are fully fault tolerant and load-sharing in an N+1

configuration. After the system is properly configured, if one PSU fails, the others provide sufficient

power to operate a fully loaded switch.

AC Power Supply

Figure 7 shows the 2400 W AC power supply unit. This power supply can run from 180 to 264 V AC

and delivers 2400 W of power. The power supply bay in the BlackDiamond 20808 switch can

accommodate up to five 2400 W AC PSUs.