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2 – General Description
Power Supplies
59021-07 A 2-9
D
2.6
Power Supplies
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, an On/Off
switch, and two status LEDs as shown in Figure 2-9. After connecting a power
supply to an AC voltage source and placing the power switch in the On position,
the power supply is energized and DC voltage is delivered to the switch logic
circuitry. Refer to Section 6 Removal/Replacement for information about replacing
a power supply.
Figure 2-9. Power Supply Components
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.
AC Power
Receptacle
Output Power LED
(Green)
Over Temperature LED
(Amber)
On/Off Switch