5 Snap the cover into place over the terminal block.
6 Energize the DC circuit.
Replacing a 750 W Internal DC Power Supply
The ExtremeSwitching X695 switch can accommodate two 750 W DC power supply units (PSU) with
either front-to-back or back-to-front airflow.
Note
For information on replacing those units, see Install a Replacement 750 W DC Power Supply
on page 295. Bear in mind that you cannot combine power supplies of dierent wattages in
the same switch.
You need the following tools and materials to replace an 750 W DC power supply:
•
#1 Phillips screwdriver
•
Torque screwdriver and wrench or torque driver with attachments for tightening screws and nuts
•
Thermal protective gloves (required for removal of a power supply)
Remove a 750 W DC Power Supply
To remove an installed 750 W DC power supply, follow these steps:
Caution
The DC power supply may be hot to the touch; use thermal protective gloves when handling
the power supply during removal.
1 De-energize the DC circuit.
2 Disconnect the DC power cables:
a Pull the cover o the terminal block.
b Loosen the screws that secure the cable terminals to the terminal block.
c Slide the wires out from under the captive washers.
Warning
Be sure to disconnect all power cables before you disconnect the chassis ground wire.
3 Disconnect the ground wire as follows:
a Loosen the screw that secures the ground wire to the terminal block.
b Slide the wire out from under the captive washer.
Replacing DC Power Supplies
ExtremeSwitching and Summit Switches: Hardware Installation Guide 294
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