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Chapter1 Before You Start
9
Safety Precautions
Power
This safety guide applies to all products connected to a power outlet. The following safety precautions
should always be strictly practiced to reduce the risk of fire, electric shock and injury.
Only use use voltage in the range of 100 to 220 volts. 220V is recommended. The power must be
ground-fixable. There are two power input ports: one is the main power input and the other is for
backup. When one fails, the other will keep the system running.
Power supply
Only use the power supply unit and cable provided with the product.
Make sure the voltage (V) and frequency (Hz) of the device matches your local voltage. If you are
not sure, ask an engineer.
Do not use an inverter output as the power supply. Only receive power from an AC power source.
Do not overload the power outlet and cable, and make sure that there is enough current capacity
for the device.
Power cable
Do not step on the power cable.
Do not bend the power cable by force and do not put any heavy object on it.
Do not pull the power cable and do not tie it in knots.
Do not heat the power cable.
When unplugging the power cable, hold the plug not the cable.
Do not use a damaged power cable, plug or loose outlet.
Cable
UTP cable cannot run parallel to power cable
Running the UTP cable parallel to the power cable in the same direction, or grounding them together
will interfere with the magnetic field and cause noise in data communication. Keep both cables as far
as possible, and use a cover to shield the magnetic field in sections the two cables run parallel.
UTP cable for high-speed connection
CAT5e or higher must be used for high-speed network (1Gbps and higher). CAT6 and higher will
provide better stability in the speed.