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Laser Radiation
by trained service personnel only. Do not attempt to replace or remove the NVRAM I adapter or the
batteries on the adapter.
3.5. Laser Radiation
CLASS 1 LASER PRODUCT
FXT Series nodes that contain optical networking ports may emit invisible laser radiation from those ports.
When no fiber-optic cable is connected, do not stare into the open apertures. In addition, install protective
covers over any optical ports that will not have a cable connected.
Some models of the FXT Series node are equipped with a DVD-ROM drive. If you have a FXT Series
node with a DVD-ROM drive, to prevent direct exposure to the laser beam and potentially hazardous
radiation exposure, do not attempt to disassemble the drive, defeat its safety interlocks, or use the drive in
any unconventional way.
3.6. Thermal Considerations
• FXT Series nodes use front-to-back cooling airflow. If the FXT Series node is installed in a rack, the
installer is responsible for ensuring that adequate airflow is available through the rack to effectively cool
the node.
• Environmental ambient temperature requirements apply to the area immediately around the node.
For a node installed into an enclosed rack or a rack with perforated doors, the ambient temperature
requirement applies to the area inside the rack or door, immediately around the node.
• Operating the FXT Series node in a rack with open EIA U spaces can cause unintended airflow paths
and associated temperature inconsistencies. To maintain proper airflow and temperatures, cover all open
rack spaces with blank panels.
• Ensure that the node cover is in place when the node is operating to assure proper airflow and cooling.
Thermal damage to the system can occur if this practice is not strictly followed.
• Do not remove disk drives or power supply units unless a replacement component is immediately
available. If you remove a replaceable component, replace it immediately after removing the original
component to ensure proper airflow and cooling. Damage to the system can occur if this practice is not
strictly followed.
