GRASS VALLEY TRINIX NXT -, Installation Manual

Page: 58 / 449

58 Trinix NXT — Installation and Service Manual
Section 9 — Planning Guide
Figure 21. Airflow Openings for TRX-NXT-512x512 Power Supply and Main Frame.
Using a set of central fan modules to cool the main chamber eliminates the
possibility of cooling loss in one area due to failure of a single fan.The
system will continue to operate if a fan does fail. Grass Valley recommends
that you replace the fan and return the system to normal redundant opera-
tion as soon as possible.
Cooling Asymmetric Frames
Air is taken in from the bottom of the frame (cut-outs are located on the
very bottom of the sides). This air is then drawn up through all of the Input
and Output boards as well as the matrix boards to the top rear of the frame.
The air is then expelled out the back of the router. The airflow openings for
the 128x256 frame are shown in
Figure 22 on page 59 . The airflow openings
for the 256x512 frame are shown in Figure 23 .
The 512x1024 frame is the result of years of researching how to cool a
routing switcher. The routing switcher has two fans, one on the top and one
on the bottom. Air is drawn in from the bottom of the fans and is exhausted
through the top of the frame. A two (2) RU space should be kept free on the
bottom of the frame and fan to ensure enough airflow. Do NOT place any-
thing on the top of the 512x1024 frame to prevent over heating.
A two (2) RU vent option is also available to draw intake air in from the
front of the frame (
Figure 24 on page 60 ).
Right side Rear Left side
OUT
IN
IN
IN IN
IN IN
IN
IN
OUT