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2
Rack retention thumb screws
3
Power supply unit LEDs
4
Power supply units (PSUs)
5
PSU fascia (1U)
6
Front fascia (4U)
Each PSU has a power supply connector and power cable, which are accessible from the back of the
enclosure. Power is provided by plugging a C19-C20 power cable into each power supply unit and, if
necessary, turning on the power source. The expansion enclosure does not have a power button.
Procedure
1. Connect the C19-C20 power cables to the power connectors on the rear of the expansion enclosure.
The enclosure automatically powers on and begins its Power On Self-Tests (POST).
2. Secure the power cables in the cable retainer at each power connector on the rear of the enclosure, as
shown in Figure 57 on page 47. Also, ensure that each cable is installed along one of the cable
management arms. The cable management arms also support the SAS cables.
Figure 57. Secure power cables
Important: Always secure each power cable with a cable retainer and ensure that the cable is
installed along one of the cable management arms. When secured, the power and SAS cables stay
connected when you slide the expansion enclosure out of the rack to perform service tasks.
Figure 58. Power and SAS cable connections on the back of the enclosure
3. Verify that the expansion enclosure and its components are operating as expected.
On the back of the expansion enclosure, all four fans and the expansion canister indicators (
in Figure 59 on page 48) become active when the power is connected.
Chapter 2. Installing the system hardware 47
3
and
8
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