21 Installing the Main UnitPlaces to avoid• Places exposed to direct sunlight or near a source ofheat such as a radiator• Very dirty and dusty places• Places subject to strong vibrations• Near magnetic field sources such as a television orspeakers• Near high-voltage cables such as a power cable• Near noise sources such as fluorescent lamps• Places where condensation forms easily• Humid places• Places where drastic temperature changes occur• Places which are not level• Steamy and oily places such as kitchensRack MountingWhen mounting this unit, use the following racks.Standard Rack: WU-RS71 (29 units can be mounted.)Long Rack: WU-RL76 (41 units can be mounted.)EIA equivalents (Products of other manufacturers): EIA19 inch rack, 450 mm {17-7/10"} or more depthNote: When mounting this unit into a rack of another manu-facturer, Rack Mounting Screw (W2-MSS/5008) (Option)or M5 x 12 screws (8 pcs.) are required.1. Power off the unit.2. Remove the rubber feet (4 psc.) on the bottom of theunit by loosening the screws.3. Mount the unit into the rack by fixing the rack mountingscrews (locally procured: 8 pcs). (Refer to the followingillustration.)Important:• If the rack is subject to vibration, secure the rear of theunit to the rack by using additional mounting brackets(locally procured).• To avoid loosening, secure the mounting screws surely.• When operating the units, keep the temperature insidethe rack surely below 45 °C {113 °F}.• Mount the unit into the rack with a space equivalent toapprox. 1 unit (44 mm) or more to separate from otherdevices.• Mounting ventilation fan(s) in the rack is recommendedespecially when the rack is covered with front lids.• To prevent the unit from overheating, do not block theventilation openings or slots in the coverRemove the rubber feet.Matrix Switcher WJ-SX 650Matrix Switcher WJ-SX650Matrix Switcher WJ-SX 650Make a space equivalent toapprox. 1 unit (44 mm) or moreEIA 19 inch rack