11Installation and connectionspw Installation precautionspq In addition to heeding the points presented in the “Read this first!”, observe thefollowing precautions as well.Connecting the power supplyp Be absolutely sure to use only the powercable supplied with the unit.p The power cable supplied with theunit has a 3‑pin plug with a groundingterminal.Connect to a 3‑pin AC outlet which is equipped with agrounding terminal.p Be absolutely sure to connect the ground terminal(SIGNAL GND) at the rear of the unit to the system ground.p When the unit is not going to be used for a prolongedperiod of time, turn off its power, and disconnect the powerplug from the AC outlet.Handle carefully!p Dropping the unit or subjecting it to strong impact orvibration may cause trouble and/or malfunctioning.Do not allow any foreign objects to enter inside theunit!p Allowing water, metal items, scraps of food or other foreignobjects inside the unit may cause a fire and/or electricshocks.Choosing the best installation locationp Install the unit on a sufficiently strong, stable and levelsurface for use.p Ensure a space of at least 100 mm (3‑15/16 inches)around the unit’s vents to avoid obstructing ventilation.In particular, ensure sufficient space between ventilationand wiring when using mounted in a panel or table.p Do not install the unit in a manner in which its cables andother accessories can be easily damaged.p Avoid installing the unit where it will be exposed to directsunlight or to the hot air that is blown out from otherproducts.p Installing the unit in a very humid, dusty or vibration‑pronelocation may give rise to trouble.Ventilation holes