Sierra Video Yosemite - Manual (Page 38)

SIERRA VIDEO
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Vertical Spacing Requirements
It is important to provide unrestricted vertical cooling space for all three Yosemite analog and digital video
routing switcher frames. Cooling of the Yosemite Family video switchers is by vertical convection cooling.
Some models have supplemental cooling fans built into the power supply sub-assemblies. However, the
power supply fans are only used for the power supplies and are not intended to promote airflow to the
crosspoint and output module assemblies.
The digital video routers consume approximately twice the power of similar-sized analog routing
switchers. Supplemental cooling fans are recommended in situations where there may not be good
control of ambient air temperature or where there is restricted airflow. When no cooling fans are used at
least 1RU of blank space should be left between video frames.
Component video (YC, RGB, RGB+S, RGB+H+V) and 128x256 video frames can be stacked without
immediate cooling space if a common forced air fan assembly is used at the top and/or bottom of the
frame combination.
To rack mount a Yosemite video routing switcher, simply place the unit's rack ears against the rails of the
rack, and insert proper rack screws through each of the holes in the rack ears. Use all screw holes in the
mounting ears when mounting the frame in the equipment rack to insure proper support for the frame.
AC Power Connections
The power supplies in the video routing switcher frames are universal AC inputs. Voltage selection is not
necessary because the power supply senses the correct AC input automatically. The power supply units
for the Yosemite video routers are internal plug-in sub-assemblies. If you only ordered one power supply
with your initial system, you can add a second supply in the future.
When redundant power supplies are used, two AC power cords should be connected to separate AC
lines or circuit breakers to maximize the benefits of the having two power supplies.
Turn on power to the frame ONLY AFTER all video and control connections have been completed as
described below.