Extreme Networks ExtremeSwitching SLX 9250 Hardware Installation Manual page 55

Installing Your Switch
Connecting the Ground Wire to a 750 W DC Power Supply
Follow these steps to connect the ground wire to a 750 W DC power supply.
Warning
Be sure to connect the chassis ground wire before you connect any power cables.
Warning
Be sure to disconnect the ground wire after you disconnect all power cables.
1. Verify that the DC circuit is de-energized.
2. Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end to an
appropriate ground point on the rack.
3. Connect the ground wire to the grounding point on the power supply.
The grounding point is the middle of the three slots. Directly beneath it, you will see the international
symbol for earth ground –
Refer to diagram below - Slots for Connecting Wires to the 750 W DC Power Supply for the slot
location.
Figure 24: Slots for Connecting Wires to the 750 W DC Power Supply
a. Insert the stripped end of the ground wire all the way into the slot.
b. Insert a #1 Phillips screwdriver into the hole below the slot, and tighten.
c. Gently tug the ground wire to make sure it is fastened securely.
4. Connect the other end of the wire to a known reliable earth ground point at your site.
When you have connected the ground wire, connect the power supply to the power source using the
two input cables. Follow the instructions in
Voltage on page 55.
Connecting a 750 W DC Power Supply to the Source Voltage
Two 750 W DC power supplies are available: model XN-DCPWR-750W-F (front-to-back airflow) and
model XN-DCPWR-750W-R (back-to-front airflow). Both can connect to a –48 V power source.
Installing a 750 W Internal DC Power Supply
– on the body of the switch.
Connecting a 750 W DC Power Supply to the Source
ExtremeSwitching SLX 9250 Hardware Installation Guide 55