Dell PowerEdge 2550 Rack Installation Instructions page 11

F i g u r e 1 - 3 . Tw o - P o s t , O p e n - F r a m e R e l a y R a c k W i t h W i d e - H o l e S p a c i n g
3.5 inch (2 U)
CAUTION: The 2-U support tray is designed to support a single system in a
2 -post open frame relay rack. Do not attempt to install any other system in this
support tray. Damage to the system and personal injury to you and others may
result.
Flush-Mount Installation
This procedure uses the same support tray kit, but it does not use the center-mount
brackets.
Place the support tray into the rack with the bottom of the tray at the marks you made
1
in step 4 (for a universal-hole spacing rack) or in step 5 (for a wide-hole spacing rack)
in the section, "Marking the Rack." The center-mount brackets, the 10-32 x
0.375-inch truss-head screws, and the #10 internal-star washers are not used when
mounting the support tray's front mounting bracket flush against the 2-post rack.
If you are installing the support tray in a rack with universal-hole spacing, install four
2
12-24 x 0.5-inch pan-head Phillips screws to secure the support tray using the upper
and lower holes that you marked on the rack's front surface (see Figure 1-4).
An internally threaded stud projecting from the front of the tray flanges accepts the
captive fasteners on the front panel of the system.
1.75 inch (1
0.5 inch
1.25 inch
Ra c k In s ta l lati on Gui de
1-5