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2 – General Description
Fans
2-10 59021-05 B
Q
Each power supply is capable of providing all of the switch’s power needs. During
normal operation, each power supply provides half of the demand. If one power
supply goes offline, the second power supply steps up and provides the
difference.
The power supplies are hot swappable and interchangeable. Hot swappable
means that you can remove and replace one power supply while the switch is in
operation without disrupting service.
Each power supply has two status LEDs: an Output Power LED (green) and an
Over Temperature LED (amber):
The Output Power LED illuminates to indicate that the power supply is
producing DC voltage at the proper levels.
The Over Temperature LED illuminates to indicate that the power supply is
overheating. When a power supply overheats, the switch extinguishes the
Output Power LED and shuts down the power supply. Refer to
Section 5 Diagnostics/Troubleshooting for information about troubleshooting
over temperature conditions.
2.6
Fans
The switch is equipped with two fans as shown in Figure 2-10. If one fan should
fail, the other fan is capable of providing the necessary cooling until the failed fan
can be replaced. The fans are hot swappable and interchangeable. Refer to
”Fans” on page 6-4 for information about removing and replacing the fans. Air flow
can be front-to-back or back-to-front depending on the switch model.
Figure 2-10. Fans
Fans