Never touch the power plug with wet hands. PR204 PR201• This may result in electric shock.Do not pour or wet the unit.• This may result electric shock or fire. Turn the power off immediately and contactqualified service personnel for service.Do not touch the unit, ethernet cable, coaxial cable, AC cord, or powerplug during thunderstorms.• This may result in electric shock.Do not touch the core of the coaxial cable.• This may result in electric shock. A maximum of DC 60 V is applied to the coaxialcable.1.5.2 CAUTIONIf you do not use the unit for a long period of time, unplug the powercable from the receptacle. PR204 PR201• Otherwise, it may result in a fire or electric shock.Do not touch any metal edges with your hands.• Doing so may cause injury.Do not connect other devices to the BNC connector of the unit.• This may damage the unit.1.6 General PrecautionsFollow the instructions written in Important safety instructions (see page 4) and 1.5 ForYour Safety (see page 12) together with the instructions written below.1. Follow the following precautions in order to maintain product performanceover long periods of time.• Do not use the unit in areas with high temperatures or humidity for long periodsof time. Use in these areas can degrade parts which can shorten the life-span ofthe unit.• Improve heat dissipation in the installation location and do not expose the unit todirect heat from heating appliances.2. The unit is intended for indoor use only and should not be mounted outdoors.3. Exercise care not to let the unit get wet.• Use the unit where it will not be subjected to water droplets or splashes.4. The unit does not have a power switch. PR204 PR201• To disconnect this unit from the power supply, unplug the AC adapter powercable or turn off the PoE power supply device. If installation requirements do notOperating Instructions 151 Preface