Installation Guide

To prepare the cable wires, follow these steps:
1 On each cable wire, strip 6 mm (0.25 inch) of insulation from one end.
2 Repeat the previous step for the other two cable wires.
Grounding the Switch Chassis
Before installing DC power supply units in your switch, perform these steps:
1 Verify that the DC circuit is de-energized.
2 Identify the grounding lug on the rear of the switch.
The grounding lug is identified by the international symbol for earth ground:
3 Attach the ground wire to the grounding lug as follows.
Use stranded copper wire, sized between 14 AWG and 6 AWG.
a At one end of the ground wire, strip the insulation to expose 12 mm (1/2 in) of bare wire.
b Insert the stripped wire into the grounding lug.
c Using a straight-tip torque screwdriver, tighten the retaining screw to 2.25 N m (20 in‑lb).
4 Connect the other end of the wire to a known reliable earth ground point at your site.
You can now install one or two DC power supplies, following the steps in Install a 750 W DC Power
Supply on page 203.
Install 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 switch chassis has been grounded (see Grounding the Switch Chassis on page 203).
•
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.
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.
Caution
Do not slam the power supply into the switch.
6 To install a second power supply, repeat the procedure.
When you are finished, connect the ground wire to each power supply. See Connecting the Ground
Wire to a 750 W DC Power Supply on page 204.
Installing Your Extreme Networks Switch
ExtremeSwitching and Summit Switches: Hardware Installation Guide 203