NX-7510 and NX-7530 integrated services platforms are initially configured with a single AC power supply. An NX-7520 integrated services platform is initially configured with two DC power supplies. Installation of an Uninterruptible Power Supply (UPS) is recommended if a second power supply is installed in an NX-7510 or NX-7530. To replace a failed power supply or install a new power supply, see NX-7500 Series Integrated Services Platform Power Supply Installation