Each switch runs with two replaceable internal power supply modules that provide all of the power needed for the switch to operate. You can remove one power supply module without interrupting the switch's operation. Supported power supply configurations include two 800 W AC power supply modules, two 800 W DC power supply modules, or one 800 W AC and one 800 W DC power supply module. Power supply modules have integrated cooling fans that operate independently of the switch fans, and are available with front-to-back or back-to-front airflow. The direction of the airflow in both power supply modules must be in the same direction, and must also be the in same direction of the airflow in the fan modules.
Power supplies are ordered separately for base model 7720-32C. Power supplies are included with other models.
Warning
Make sure that the power source circuits are properly grounded, then use the power cord supplied with the device to connect it to the power source.Warning
If the installation requires a different power cord than the one supplied with the device, make sure you use a power cord displaying the mark of the safety agency that defines the regulations for power cords in your country. The mark is your assurance that the power cord can be used safely with the device.
Caution
Disassembling any part of the power supply and fan assembly voids the warranty and regulatory certifications. There are no user-serviceable parts inside the power supply and fan assembly.Caution
Ensure that the airflow direction of the power supply unit matches that of the installed fan tray. The power supplies and fan trays are clearly labeled with either a green arrow with an "E", or an orange arrow with an "I."Caution
If you do not install a module or a power supply in a slot, you must keep the slot filler panel in place. If you run the chassis with an uncovered slot, the system will overheat.Two 800 W AC power supply options, with front-to-back or back-to-front airflow, are supported on the switch.
Note
AC power input cords are not provided with AC power supplies. You can order an appropriate cord from Extreme Networks or from your local supplier. The power cord must meet the requirements listed in Power Cord Requirements for AC-Powered Switches and AC Power Supplies.For information on installing or replacing an AC power supply, see Replace Internal Power Supplies.
LEDs on the 800 W AC power supply provide information on the unit's operational status. See 800 W AC Power Supply LEDs for details.
Two 800 W DC power supply options, with front-to-back or back-to-front airflow, are supported on the switch.
Note
DC power input cords are provided with DC power supplies.For information on installing or replacing a DC power supply, see Replace Internal Power Supplies.
LEDs on the 800 W DC power supply provide information on the unit's operational status. See 800 W DC Power Supply LEDs for details.