Installation Guide

Table Of Contents
5. Push the power supply in until the latch snaps into place.
Caution
Do not slam the power supply into the switch.
Note
If power supplies are not installed in both power supply bays, be sure to install a cover
over the unoccupied bay. Unoccupied bays must always be covered to maintain proper
system ventilation and EMI levels.
6. Connect the power cord to the power supply.
If the power supply is equipped with a power cord retainer, use the retainer to secure the power cord
to the power supply.
7. Connect the power cord to a grounded AC power outlet.
Warning
Always make sure that the source outlet is properly grounded before plugging the AC
power cord into the AC power supply.
8. To install a second power supply, repeat the procedure.
Turn on the Switch
An AC power cord is not included with the AC power supply. You can purchase AC power cords for use
in the US and Canada from Extreme Networks or from your local supplier. The cord must meet the
requirements listed in #unique_112.
To turn on an Extreme Networks switch, do the following.
1. For switches that are connected to AC power, connect the power cord to the AC power input socket
on the switch (or power supply) and to an AC power outlet.
2. For switches that are connected to DC power, do the following:
a. Verify that the DC circuit is de-energized.
b. Verify that the ground wire is connected to the grounding lug on the rear of the switch.
The grounding lug is identified by the international symbol for earth ground:
c. Verify that the DC power input cables are properly connected to the DC power supplies at the
rear of the switch.
d. Energize the circuit.
3. When power is connected, verify that the PSU LED turns green.
When the PSU LED has turned green, follow the instructions in Connect Network Interface Cables on
page 79.
If the PSU and RPS LEDs do not turn green, refer to the LEDs topic for your switch model (in
"#unique_113") for troubleshooting information.
Turn on the Switch
Installing Your Switch
78 ExtremeSwitching 5520 Series Hardware Installation Guide