H3C S12500 Installation Manual page 25

•
The rack is sturdy and securely grounded.
•
There is sufficient clearance of 0.8 m (2.62 ft) around the rack for heat dissipation and
installation.
•
There is no debris inside or around the rack.
•
The total height of the switches to be installed is no higher than the height of the rack and
enough clearance is reserved for cable routing.
•
Make sure the clearance above the slide rail is sufficient for the switch and the slide rails can
support the weight of the switch. For the dimensions and weight of the S12500 switch, and the
weight of the hardware components, see "Appendix A Technical specifications."
Installing slide rails and cage nuts to the rack
Before installing the switch in the rack, secure slide rails to the rack. Besides slide rails, you can use
a rack shelf to support the switch. This document describes how to install slide rails only.
To ensure correct installation, use industry-standard slide rails or rack shelves. Slide rails or rack
shelves are not provided with the switch. H3C recommends that you order H3C slide rail
LSTM2KSGD0. The slide rail can be used in racks where the distance between the front and rear
rack posts is in the range of 500 mm to 800 mm (19.69 in to 31.50 in).
Installing slide rails
If the rack has slide rails, skip this section.
The appearance and installation methods of slide rails depend on the slide rail types.
This section uses a 19-inch rack as an example to describe the installation procedures. The rack unit
(RU) (44.45 mm, or 1.75 in) measures the height of rack posts. As shown in
has three mounting holes with center-to-center separations of 15.88 mm (0.63 in), 15.88 mm (0.63
in), and 12.70 mm (0.5 in). When installing the slide rails, make sure the bottom edge of the slide rails
aligns with the middle of the narrowest separation between mounting holes.
To install the slide rails:
Mark the position of the slide rail on the rack posts. Make sure the bottom edge of the slide rails
1.
or rack shelf aligns with the middle of the narrower metal area between holes as shown
in Figure
TIP:
A total of six screws are required within the 2 RU of installation space for each side of the slide
rail. You can mark the position for the top cage nut only.
12.
17
Figure 12, each 1 RU