Powering on the 5U expansion enclosure
Use the following procedure to provide power to the 5U expansion enclosure as part of the initial
installation process or after a service procedure.
Before you begin
Important: Before you connect the power cables to the rear of the enclosure, always check that the
expansion enclosure is secured in the rack. If needed, tighten the thumbscrews on the front of the
enclosure ( 2 in Figure 52 on page 55) to ensure that the enclosure drawer does not roll open.
About this task
The 5U expansion enclosure has two power supply units (PSUs) that are accessible from the front of the
enclosure ( 4 in Figure 52 on page 55). As the gure also shows, the PSUs are covered by the 1U fascia
( 5 ).
Figure 52. Features on the front of the 5U expansion enclosure
1 Display panel LEDs
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 53 on page 56. Also, ensure that each cable is installed along one of the cable
management arms. The cable management arms also support the SAS cables.
Chapter 4. Installing the system hardware
55
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