3.2.3 Frame Earth Connection1. Loosen the screw.2. Insert an earthing wire (user-supplied).3. Tighten the screw.4. Connect the earthing wire to earth.AB(1)A. ScrewB. Earthing wire(1) To earthWARNING• Proper earthing (connection to earth) is very important to reduce the risk to the user ofelectrocution or to protect the unit from the bad effects of external noise in the case of alightning strike.• The earthing wire of the AC cable has an effect against external noise and lightning strikes,but it may not be enough to protect the unit and to ensure electromagnetic compatibility. Apermanent connection between earth and the earth terminal of the unit must be made.CAUTIONFor earthing wire, green-and-yellow insulation is required, and the cross-sectional area of the conductormust be more than 0.75 mm2 or 18 AWG.NoticeBe sure to comply with applicable local regulations (e.g., laws, guidelines).3.2.4 19-inch Rack MountingWARNING• Be careful not to drop any components. Dropping components may damage them or cause aninjury.• When mounting the unit on a 19-inch rack, only use the 19-inch rack mounting equipment(attachment bracket, screws) included with the unit.CAUTION• When the unit is mounted on a 19-inch rack, make sure that the installation of the unit does not causethe temperature of the rack to exceed its limit.• When the unit is mounted on a 19-inch rack, allow space of at least 5 cm to the sides of unit and atleast 10 cm to the rear of the unit for ventilation of the fan.3.2.3 Frame Earth Connection30 Installation Manual