Appendix BWiring the –48 VDC Power SupplyIf your NSG has the optional –48 VDC power supply, follow these stepsto wire the power supply.Getting StartedBefore you begin wiring the –48 VDC power supply, make sure that youprovide the necessary overcurrent protection, wires, and powerconnector.Power Source SpecificationsThe DC power source feeding the NSG device must meet the followingrequirements:■ Electrically isolated from any AC power source■ Positive ground. The Positive bus of the DC power source must bereliably connected to the Ground bus.Each feed-pair must provide a continuous supply of power that meets thefollowing specifications:Parameter SpecificationVoltage 36 to 75 VDCMax. operating current 4 ampsMax. input surge current 35 amps
