Install a 1600 W Internal DC Power Supply

Required Tools and Materials to Install a 1600 W DC Power Supply

You need the following tools and materials to install or remove a 1600 W DC power supply in an Extreme 8820 switch.

• A #6 AWG copper cable for grounding the power supply and a DC power input cable, which is provided, to connect the power supply to the DC power source. The ground connection is green or green with a yellow stripe.
• Connection hardware appropriate to the installation site:
  • Hardware for connecting the power wires to the DC source
  • Hardware for connecting the ground wire to the site grounding point
• Stripping tool
• #1 cross-head (Phillips) screwdriver
• ESD-preventive wrist strap
• Thermal protective gloves (for removal of a warm power supply)

Prepare the Cables for a 1600 W DC Power Supply

You will need two cable wires for each installed DC power supply: one DC power input cable, which is provided, and a grounding cable. We recommend that each cable have differently colored insulation, as described in Required Tools and Materials to Install a 1600 W DC Power Supply.

To prepare the cable wires, follow these steps:

1. Strip 6 mm (0.25 inch) of insulation from one end of the cable wire, on each cable wire, if necessary.
2. Repeat step 1 for the other cable wire.

Install a 1600 W DC Power Supply

Before installing a 1600 W DC power supply (either part no. XN-DCPWR-1600W-F or part no. XN-DCPWR-1600W-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. Remove a blank panel from the rear of the switch if necessary.
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.
   

   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 Connect the Ground Wire to a 1600 W DC Power Supply.

Connect the Ground Wire to a 1600 W DC Power Supply

Follow these steps to connect the ground wire to a 1600 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 metal end to an appropriate ground point on the rack.
3. Connect the ground wire to the grounding point on the power supply, which is labeled GND. See Front view of 1600 W DC PSU.

   

   Front view of 1600 W DC PSU

   

   Directly beneath the grounding point, you will see the international symbol for earth ground – – on the body of the switch.

   1. Attach mm ring lug to the 6 AWG ground wire.
   2. Secure the ring lug with a 5mm hex socket and tighten.
   3. 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 provided DC power input cable. Follow the instructions in Connect a 1600 W DC Power Supply to the Source Voltage.

Connect a 1600 W DC Power Supply to the Source Voltage

The DC power connection at your facility must be made by a qualified electrician, following these instructions.

Warning

Always make sure that the DC circuit is de-energized before connecting or disconnecting the DC power cables on the DC power supply.

Caution

Provide proper connection and strain relief on the DC power cables in accordance with all local and national electrical codes.

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. Plug the connector that contains the negative (V+DC) and positive (V-DC) wires to the power supply.

   

   

4. Connect the cables to the DC source voltage, using hardware appropriate to the installation site and following local and national electrical codes.

Power up to the switch, following the steps in Turn on the Device.

Leave the ESD strap permanently connected to the rack, so that the strap is always available when you need to handle ESD-sensitive components.