Hardware Description 27Hardware ComponentsPower SuppliesThe device has an internal power supply unit (AC unit) and a connector to connect the device to an externalpower supply unit (DC unit). The external unit provides redundancy and is called an RPS unit. To power upthe device, only one power supply is required. Operation with both power supply units is regulated throughload sharing.Load sharing is where the device power requirements are divided between the two power supplies. If onepower supply has an outage, the second power supply automatically continues providing power to the wholedevice.Power supply LEDs indicate the power supply status. For more information on LEDs, see "LEDDefinitions" on page 25.AC Power Supply UnitThe AC power supply unit converts standard 220/110V AC 50/60 Hz to 5V DC at 5A, 12V DC at 3A. Theunit 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 andindicates whether the AC unit is connected.Fan (FAN) Green Static The device fans are operating normally.Red Static One or more fans are not operating.Redundant Power Supply (RPS) Green Static The redundant power supply is currently operating.Red Static The redundant power supply is not operating.OFF The redundant power supply is not currentlyoperating.Main Power Supply (PWR) Green Static The main power supply is currently operatingnormally.OFF The main power supply is not currently operating.Red The main power supply has failedTemperature (TEMP) OFF The system temperature is normal.Red Static The system temperature is too high.Table 2-3. System LED IndicationsLED Color Description
