Initial Startup and Configuration3-2 7976-A2-GB20-10August 1998Connecting Power to the UnitIf your package includes a power pack: Plug the power pack into an ac outlethaving a nominal voltage rating between 100–240 Vac. Connect the output cableof the power pack to the connector marked POWER on the rear panel.If your package includes a direct-connection dc power cable: Connect the unit toan external dc power source as described inConnecting the Unit to an OptionalExternal DC Power Source.Optional Power SourcesUsing the optional dc power cable, the unit is capable of operating on either a+24 Vdc power source, –48 Vdc single source battery, or –48 Vdc redundantsource batteries (for power backup).Connecting the Unit to an Optional External DC Power SourceUsing the dc power cable, the Hotwire Model 7976 Standalone Termination Unitis capable of operating on a +24 Vdc power supply.NOTE:The E1 M/SDSL Unit is typically powered by the ac power module. Use thefollowing procedures only if you want to use an optional dc power source. ProcedureTo use the dc power cable:1. Connect the green wire to a suitable earth ground.2. Connect the orange wire to the +24 Vdc source.3. Connect the white wire to the return.4. Cut the black, red, and blue wires off at the outer insulation.5. Plug the power connector into the Model 7976 Standalone Termination Unit.123456XXEarth GroundRTN+24 VdcXBlackRedGreenWhiteOrangeBlue98-14158-01+24 Vdc Power Supply Pinouts
