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2 – General Description
Power Supplies and Fans
2.5
Power Supplies and Fans
The power supplies convert standard 110 or 230 VAC to DC voltages for the
various switch circuits. Each power supply has an AC power receptacle and two
status LEDs as shown in
The Power Supply Status LED (green) illuminates to indicate that the power
supply is receiving AC voltage and producing the proper DC voltages.
The Power Supply Fault LED (amber) illuminates to indicate that a power
supply fault exists and requires attention.
Power Supply
Fault LED
(Amber)
Power Supply
Status LED
(Green)
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 pluggable
means that you can remove and replace one power supply while the switch is in
operation without disrupting service. Refer to Section 6 Removal/Replacement for
information about replacing the power supplies.
Connecting a power supply to an AC voltage source energizes the switch logic
circuitry. Internal fans provide cooling. Air flow is front-to-back.
2-10
Figure
2-8:
AC Power
Receptacle
Figure 2-8. Power Supplies
0
59096-00 A
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