Dell PowerConnect J-EX4200 Hardware Manual page 113

One pair of side-rail brackets
One pair of rear brackets
8 screws—and 8 cage nuts and washers if your rack requires them—to secure the
chassis and the rear brackets to the rack (provided)
Dust covers for ports (for J-EX4200-24F switches only; optional)
CAUTION: If you are mounting multiple units on a rack, mount the heaviest
unit at the bottom of the rack and mount the other units from the bottom of
the rack to the top in decreasing order of the weight of the units.
To mount the switch on four posts in a rack:
If your rack has unthreaded round or square holes:
1.
Determine the location on the rack where you want to mount the switch, and install
a.
2 cage nuts in the appropriate holes in each rack post, front and rear.
Use Figure 31 on page 97 or Figure 32 on page 97 to help you with cage-nut
installation.
Figure 31: Installing a Round-Hole Cage Nut (Clip Nut)
Figure 32: Installing a Square-Hole Cage Nut
To ensure that the switch chassis is level after installation, verify that the cage nuts
b.
on the front of the rack are aligned with the cage nuts in the back.
Attach the front brackets (either the flush or the 2-in.-recess brackets) to the side-rail
2.
brackets using six 4-40 flat-head Phillips mounting screws. See Figure 33 on page 98.
Chapter 9: Installing the Switch
97