Grass Valley Trinix NXT v.3.3.1 - Manual (Page 126)

126 Trinix NXT — Installation and Service Manual
Section 3 — Hardware Installation
Customer-Supplied Rack Requirements
The Routing switcher is shipped without a rack; the router should be
mounted into a 19-inch wide frame or other suitable enclosure that pro-
vides power and cooling facilities for the equipment.
A two (2) RU space should be kept free beneath the fan on each 512x1024
frame to ensure enough airflow to prevent the routing switcher from over-
heating. A two (2) RU vent option is also available to help draw air in from
the front of the frame.
The following items should be considered when choosing a rack:
a. It may be necessary to install special rack spacers so that the router's
access door can be opened far enough to permit removal of
components on the right side of the frame (such as power supply
modules).
• The spacers, which are available on request, should only be
installed when the rack's mounting holes are recessed more than
0.6 inch (15.2 mm) from the front surface of the rack. For more
information, see
Figure 61 on page 134 .
b. Some Routing switchers are supplied with port expanders, which
depending on the configuration can be used to provide dual
outputs, quad outputs, input expansion, output expansion, and
multi-frame output monitoring.
• For illustrations of port expander applications, see Duplication
and Expansion on page 69 .
c. Power requirements are shown in the AC Power Input on page 115
section.
Note Grass Valley recommends each power supply have its own dedicated 20A
circuit breaker. The possibility of having a failed supply shut down a breaker
is a possibility if circuit breakers are shared. This failure will remove a func-
tioning Power supply from operation.
Where possible, we recommend running different supplies on different
phases of the AC mains. This configuration will provide additional protection
from power interruption if there is an unrelated phase problem with the
power distribution.
d. Environmental limits are shown in the Environmental section on
page 118.
Connecting the Power Supplies
The Power supplies for the Trinix are factory-installed and auto-sensing.
NO field-adjustments to the actual power supply should be necessary.