Q-Logic SANBOX2-64 manual Power Supply Modules, Power Supply Components

￿	2 – General Description
	Power Supply Modules

2.6

Power Supply Modules

The power supply modules convert standard 110 or 230 VAC to DC voltages for the various switch circuits. Each power supply module has an AC power receptacle and two status LEDs as shown in Figure 2-9. Each power supply module 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. After connecting a power supply to an AC voltage source, the power supply is energized and the DC voltages are delivered to the switch logic circuitry.

Output Power LED

(Green)

Power Supply

Fault LED

(Amber)

AC Power

Receptacle

Figure 2-9. Power Supply Components

The power supplies are hot pluggable and interchangeable. Hot pluggable means that you can remove and replace one of the two operating power supplies while the switch is in operation without disrupting service. Refer to Section 6 Removal/ Replacement for information about replacing a power supply.

Each power supply has two status LEDs: a Power Supply Fault LED (amber) and an Output Power LED (green). The Power Supply Fault LED illuminates to indicate a power supply fault. Possible power supply faults include high temperature, high or low input voltage, high or low output voltage, and high current. Refer to Section 5 Diagnostics/Troubleshooting for information about troubleshooting power supply fault conditions.

The Output Power LED illuminates to indicate that the power supply is producing DC voltage at the proper levels.

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