Extreme Networks 8720 Hardware Installation Manual page 55

Installing Your Device
To prepare the cable wires, follow these steps:
1. If necessary, on each cable wire, strip 6 mm (0.25 inch) of insulation from one end.
2. Repeat step 1 for the other cable wire.
Installing a 750 W DC Power Supply
Before installing a 750 W DC power supply (part no. XN-DCPWR-750W-F or XN-
DCPWR-750W-R):
•
Verify that the airflow direction for the power supply is the same as the airflow
direction of the installed fan modules in the switch.
To install the power supply, follow these steps.
Caution
The handle on the power supply is not designed to be used to lift or carry the
power supply or the switch to which it is attached.
1. Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end
to an appropriate ground point on the rack.
2. If necessary, remove a blank panel from the rear of the switch.
3. Verify that the power supply is right side up (label on the bottom).
4. Carefully slide the power supply all the way into the power supply bay.
5. Push the power supply in until the latch snaps into place.
6. To install a second power supply, repeat the procedure.
Caution
Do not slam the power supply into the switch.
Installing a 750 W Internal DC Power Supply
Extreme 8720 Switch Hardware Installation Guide 55