DC power supply unit connectors and indicators

Each enclosure can contain two DC power supply units. Each power supply unit can provide power to the whole enclosure.

The power supply units have the components that are shown in DC power supply unit connectors and indicators.
Figure 1. DC power supply unit connectors and indicators
Rear panel of DC power supply unit, showing connectors and LEDs

Each power supply also contains fans that cool the enclosure. Cool air is drawn in through the front of the enclosure. The air passes over the drives, node canisters, and power supplies. The warmed air is ejected through the rear of each power supply. For optimal cooling, do not obstruct the airflow and ensure that all enclosure components or fillers are installed while the system is operational.

DC power supply LED indicators

Each power supply unit has four LED indicators. DC power supply LED indicators summarizes their possible values and meaning.

The LEDs have a comparable meaning to the LEDs on the AC power supply. Problem diagnosis and service procedures are the same. For details, see Procedure: Understanding the system status LEDs.

Table 1. DC power supply LED indicators.
Name Label Color State Description
Input status

Green OFF No input power detected.
ON DC input power detected.
Output status

Green OFF PSU is not providing DC output power.
ON PSU is providing DC output power.
Fault

Amber OFF No fault detected.
ON PSU fault was detected.
BLINK PSU is being identified. A fault might have been detected.
(None)

Blue N/A Not used.