Setting Up The DAU 2-13Connecting the Power CordsThe DAU contains two 450-watt power supplies. The power supplies aredesigned for automatic sensing of 115 or 230 VAC power, eliminating the needfor a line voltage selector switch. The power supplies operate at a frequency of50/60 Hz. With two power supplies installed, if one fails, the second powersupply will ensure the DAU continues to operate without interruption.Connect each power cord as follows.1. Check that the power switch on the disk array unit and those on the hostsystem, host bus adapter, and FC-AL switch are all set to OFF.See Figure 2-10.OFF ONFigure 2-10. Power Supply Switch2. Insert the power cord into the power plug on the power supply, and securethe power cord with stopper. See Figure 2-11. Repeat this step on the secondpower supply.Figure 2-11. Connecting the Power Cord to the Power Supply3. Plug the male end of the power cords into NEMA 5-15R outlet for 100-120VAC or NEMA 6-15R outlet for 200-240 VAC.This Manual:http://www.manuallib.com/nec/s1300ug-disk-array-unit-user-guide.html