Caution: You must use the supplied 8-32 x 1/4" screws to attach the rack mount flanges. A longer screw may extend too far into the ONline chassis and disrupt the installation of modules.

Figure 2-4. Attaching the Rack Mount Flanges

2.Install the provided clip nuts onto the front of the rack where you want to attach the unit. See Figure 2-3 for proper orientation.

3.Slide the unit in the rack above the installed cable tray until the rack mount flanges seat flush to the front of the rack.

Caution: While mounting the concentrator, do not leave the unit resting on the mounted cable tray since the cable tray rack mounts may not support a fully-loaded concentrator.

4.Secure the unit to the rack with the four (4) 10-32 x 5/8" truss-head screws as shown in Figure 2-5.

2 - 12 ONline 17-Slot System Concentrator Installation and Operation Guide

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3Com 5017C-LS, 5017C with load sharing installation and operation guide Attaching the Rack Mount Flanges