5 www.ubisys.de 4. InstallationMains Powered OperationPlease refer to the hardware installation guide, which was included in the product package. It providesdetailed installation instructions.Low-Voltage OperationInstead of applying dangerous mains voltage to the Router R0, you may connect a low-voltage DCsource (e.g. 12V=, 24V=, 48V=) to the supply lines of R0. Its built-in universal power supply is able tooperate from both kinds of supplies, direct and alternating current.For DC operation, connect the DC ground (0V, “minus”, negative) of your power supply to the phaseinput of R0 (marked “L”, brown) and the DC supply voltage (12…48VDC, “plus”, positive) to theneutral input of R0 (marked “N”, blue). Once powered, you should observe the normal device start-upbehaviour (the green LED will flash a few times).The built-in universal power supply can accept up to 400V=, which is an absolute maximum rating.If you are not using a safe low-voltage power-supply, utilizing the services of a professionalinstaller/electrician is imperative.