Q-Logic SB2A-16B, QLA2342 manual Power Supplies, 9. Power Supply Components

0	2 – General Description
	Power Supplies

2.5

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.

Over Temperature LED	Output Power LED
(Amber)	(Green)
AC Power	On/Off Switch
Receptacle

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.

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