Installation guide

ADC Telecommunications, Inc.
64 C
HAPTER 3: RACK-MOUNTING THE SYSTEM
You will need rack-mount screws to perform the installation procedures in
this chapter. Note that ADC does not supply rack-mount screws with the
system.
System Placement in the Rack
The number of systems that you want to install influences the placement of
the units in the rack. You can mount up to three chassis in a standard 19”
Telco rack, assuming a rack height of 7 feet (48 U’s). These sections detail
the proper installation of up to three chassis in a single rack.
In these sections, vertical rack space is measured in Units (U’s). Remember
that 1 U is equal to 1.75 inches.
When installing multiple systems in a single rack, only one plenum is
required between systems. Refer to Figures 3-2 and 3-3 for the proper
installation of multiple chassis in a single rack.
Plenums A proper rack-mount setup of the Cuda 12000 utilizes
plenums to facilitate air flow and system cooling. The ADC
plenum utilizes a single design to facilitate air flow into the
system and out of the system. When used to facilitate the
intake of air, it is referred to as an intake plenum; each
rack-mounted chassis requires an intake plenum. When
used to facilitate exhaust of air, it’s referred to as an
exhaust plenum.
Note: The first chassis in the rack requires two plenums.
CAUTION: If for any reason you are not using plenums,
be sure to leave 2 U’s of vertical rack space where they
would normally be mounted.
You must also insure that there is adequate airflow in or
off of the system.
Two 48 VDC
Power Sources
The system supports connection to up to two 48 Volt
DC power sources for optimal power availability. Power
redundancy ensures that power to the chassis continues
uninterrupted should one of the power sources fail.