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Caution – Make sure that all devices and cables that will be removed and
reinstalled in the cabinet are identified in such a way as to ensure that they go back
in the same order that they were originally in (so the host and controllers will
communicate to the same devices as before).
Seismic Anchorage
Most cabinets provide securing points on both the bottom and top of the cabinet to
allow for earthquake anchorage and protection. It is the customer's responsibility to
secure the provided cabinet against earthquakes. See
.
FIGURE 2-3
Earthquake Securing Hardware
FIGURE 2-3
The figure above is an example of earthquake anchorage. Refer to the cabinet
manufacturer's instructions or a structural engineering firm that evaluates seismic
anchorage for proper installation.
Cabinet Markings and Tray Placement
The next two sections discuss NEMA and RETMA rails. These vertical rails usually
have markings on them to indication the vertical space or height from the bottom of
the cabinet. These markings indicate where to install the Array trays. For example,
the 6540 controller tray (4U) is typically placed in the fourth tray slot. This position
goes from the 9th U marking to the 13th U marking, and may use holes 28 through
39 to secure the mounting rail and controller tray to the cabinet. Three U is used for
each expansion tray. This provides for three expansion tray slots below the controller
tray and eight expansion tray slots above the controller tray. The order for expansion
tray placement is: 0U, 13U, 22U, 31U, 3U, 16U, 25U, 34U, 6U, 19U, and 28U.
Chapter 2 Cabinet and Environmental Specifications
13
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