Subject to change without notice 27Rear panel(14) AC power cableThe power cable is used to attach the HM6050-2 to the mains outlet.(See: “Setting into operation”).(15) Ground blockThe ground block is made of aluminum and fastened to the backsideof the housing by two screws (below the mains cable outlet). Terminal“PE” may not be used as reference ground because it is connected tothe PE line of the mains cable via a filter. If tests are performed outsidean EMC chamber only a short ground cable may be used. Inside achamber the ground cable has to be connected between the groundblock and the chamber’s shielding material (VDE 0877, Part1).(16) RS-232 interfaceSafety hintsAttention!All interface lines are galvanic coupled to the LISN.As mentioned in paragraph “Safety” the LISN has to be operated on athree line mains outlet (with protective ground line). An interface cablebetween the RS-232 interface of the LISN and the COM port of a PCcauses a galvanic connection between the two devices. To excludenegative effects on other safety provisions the PC’s power cable mustbe connected to the same mains outlet as the LISN.Disregarding these safety hints (also see “Safety”) will result inthe loss of HAMEG’s warranty in case of damages. HAMEG isnot liable for any injuries to personnel or any equipment.