Dell Force10 S25N-S50N Installing S25N and S25V Systems - Page 33
Installing the Redundant DC Power Supply for the S25V
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Installing the Redundant DC Power Supply for the S25V The Redundant Power Supply Unit (PSU) for the S25V is a 470W AC/DC rectifier. It includes rack-mounting hardware, an AC cable, and a cable to connect to the DC power leads on the S25V. The power supply is oversized to support the Power over Internet (PoE) feature, too large to install in the S50 External Power Shelf (EPS). Instead, to install the PSU in a rack, complete the steps below for a single unit. For a tandem installation, see Inserting Tandem PSUs into a Rack on page 34. Step 1. Task Using a #2 Phillips screwdriver, attach the short sides of the rack ears to the front corners of the power supply with the supplied screws. Figure 17 Attaching Rack Ears to PSU 2. Insert the PSU into the rack and brace it temporarily in the rack so that the screw holes in the long sides of the rack ears are flush and align with the screw holes in the rack posts. 3. Secure the PSU on the left and right sides by tightening the supplied screws through the flanges to the side of the rack, as shown in Figure 18. (Cage nuts are also supplied for racks that have mounting holes without threads.) Figure 18 Mounting Single PSU in Rack Installing S25N and S25V Systems 33