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4 DSR Switch Installer/User Guide
Safety Precautions
To avoid potential video and/or keyboard problems when using Avocent products:
• If the building has 3-phase AC power, ensure that the computer and monitor are on the same phase.
For best results, they should be on the same circuit.
To avoid potentially fatal shock hazard and possible damage to equipment, please observe the
following precautions:
• Do not use a 2-wire power cord in any Avocent product configuration.
• Test AC outlets at the target device and monitor for proper polarity and grounding.
• Use only with grounded outlets at both the target device and monitor. When using a backup
Uninterruptible Power Supply (UPS), power the target device, the monitor and the DSR switch from
the UPS.
NOTE: The AC inlet is the main power disconnect.
Rack mount safety considerations
• Elevated Ambient Temperature: If installed in a closed rack assembly, the operating temperature of
the rack environment may be greater than room ambient. Use care not to exceed the rated maximum
ambient temperature of the switch.
• Reduced Air Flow: Installation of the equipment in a rack should be such that the amount of airflow
required for safe operation of the equipment is not compromised.
• Mechanical Loading: Mounting of the equipment in the rack should be such that a hazardous
condition is not achieved due to uneven mechanical loading.
• Circuit Overloading: Consideration should be given to the connection of the equipment to the supply
circuit and the effect that overloading of circuits might have on overcurrent protection and supply
wiring. Consider equipment nameplate ratings for maximum current.
• Reliable Earthing: Reliable earthing of rack mounted equipment should be maintained. Pay
particular attention to supply connections other than direct connections to the branch circuit (for
example, use of power strips).