Digital Equipment DEC 3000 Series Service Information page 308

Installation Procedure
(IEC RS–310 Cabinet),
Determine the
Installation
Area in the
Cabinet
E–2
Continued
To determine the installation area for the PE50A–B9/D9 unit in
an IEC RS-310 cabinet, perform the following steps at the front
and rear cabinet rails. See Figure E–1.
Digital does not recommend installing the system in
the top area of the cabinet, for stability reasons.
The space between mounting holes in the cabinet rails follows a
pattern of 0.50 inches (1.27 cm), 0.625 inches (1.59 cm), and 0.625
inches (1.59 cm). This pattern is repeated for the length of the
rails.
Steps Action
1 Select a section of the cabinet rail where there is a 0.50
inch (1.27 cm) space between two holes.
2 Make a mark between the holes. This is your starting
point.
3 Count up or down three holes. This is one set and
equals 1.75 inches (4.45 cm).
4 Count up or down nine sets and make a mark. The area
between the marks is the installation area.
The total installation area is 15.75 inches (40.01 cm). The
equation for calculating the total area is
1.75 inches (4.45 cm)
The hole count described in this section will install
the system in any predetermined 15.75-inch (40.01 cm)
area.
WARNING
2
9 sets = 15.75 inches (40.01 cm)
NOTE
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