10 | P a g e A 1 0 H a r m o n y T M C o n t r o l l e r 2 0 0 0 I n s t a l l a t i o n G u i d ePower Supply Unit InstallationThis guide describes how to connect the power supply unit to an applicable AC or DC power source.The following topics are covered:• Overview• DC Power Supply Installation• Power Supply Hot SwapCAUTION: Do not attempt to install or operate damaged equipment. As with anyelectrical equipment, personal injury or damage to other equipment canresult from commissioning damaged electrical equipment.NOTE: Follow all applicable regulations for installation of electrical equipment; forexample, in the United States of America, the National Electrical Code.For devices with multiple power supplies, it is recommended that all powersupplies be plugged-in.