Dell PowerConnect 5448 User's Guide - Page 30
Reset Button, Ventilation System
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AC Power Supply Unit The AC power supply unit converts standard 220/110V AC 50/60 Hz to 5V DC at 5A, 12V DC at 3A. The unit automatically senses the available voltage rating (110 or 220V) and no setting is required. The AC power supply unit uses a standard AC220/110V connector. LED indicator is on the front panel and indicates whether the AC unit is connected. DC Power Supply Unit An external DC power supply unit is used as a redundant power supply unit. Operation is possible with power supplied from this unit only. RPS600 connector type is used. No configuration is required. LED indicator is on the front panel and indicates whether DC unit is connected. When the device is connected to a different power source, the probability of failure in the event of a power outage decreases. Reset Button The reset button, located on the front panel, manually resets the device. Ventilation System The device uses a fan system for cooling. Fan operational status can be verified by observing the LEDs that indicate if there is a faulty fan. For information, see "LED Definitions" on page 27. 30 Hardware Description