KUHNKE Automation 6.2.2 Preparatory Steps Attention : To avoid accidents, disconnect unit from the mains prior to installing or ser- vicing it. Install the units in a suitable housing and protect them against dirt. Only qualified persons to set up and service the unit! Take heed of the following regulations: DIN VDE 0100, part 460 DIN VDE 0100, part 725 DIN VDE 0113, part 1 DIN VDE 0160 DIN VDE 660, part 100 DIN VDE 0660, part 102 DIN EN 50178 IEC 947-4-1 Mounting instruction: You are recommended to install the units vertically on a horizontal bus rail system. 24 E 774 GB 30.06.2014