Hardware reference guide

Hardware Installation
718
35013379 11/2011
Hardware Installation – Space Requirements for the Quantum System
Overview
When mounting Quantum systems in a cabinet, a 4 in. (101.60 mm) space should
be maintained above and below the modules. Side spacing should be 1 in. (25.40
mm) minimum. Wiring ducts up to 2 in. (50.80 mm) square may be centered
horizontally between backplanes.
Duct work or similar items mounted in this manner that extend further out than 2 in.
require a 4 in. space (instead of 1 in.) between them and the upper and lower
modules, to allow for air movement. (Refer to the Spacing Requirements Figure,
page 719 for the spacing required when installing Quantum systems.) There is no
front clearance restriction regarding heat. Only sufficient mechanical clearance is
required.
Spacing Requirements
The following table gives a summary of the spacing requirements for a Quantum
system.
Minimum Spacing Location
4 in. (101.60 mm) Between the top of the cabinet and the top of the modules in the upper
backplane.
4 in. Between the cabinet bottom and the bottom of the lower modules in
the lower backplane.
4 in. Between the upper and lower modules when the backplanes are
mounted one above the other.
1 in. (25.40 mm) On either side between the cabinet walls and end modules.
Note: Wiring ducts up to 2 in. x 2 in. (50.80 mm x 50.80 mm) may be centered between back
planes. If the duct extends further than 2 in. out from the mounting panel, there must be a 4
in. space between the modules and duct on the top and bottom.