Connection Chapter 2GPIB-130 User Manual 2-2 © National Instruments CorporationConnecting an External Power SupplyCaution: Not for installation in air ducts or plenums. For installation in other environmentalair handling spaces, use only with cable classified by U.L. Inc. as to fire and smokecharacteristics in accordance with section 725.2(B) of the National Electrical Code.To connect an external power supply to the GPIB-130, complete the following steps.Caution: Failure to follow these steps for installation may result in damage to your GPIB-130and your system.1. Make sure that the power switch on the side panel is in the off position.2. Inspect the power supply to confirm that it is compatible with the line voltage availablefrom the wall outlet.3. Push the phono-jack connector of the external power supply into the 5VDC jack of theGPIB-130.4. Turn the phono-jack connector so that it screws into the threading on the 5VDC jack.5. Plug the power supply into the wall outlet.6. Connect the transmission cable to both GPIB-130s.7. Slide the power switch of both extenders to the on position.The GPIB-130 extension is now operational.Connecting to a Specially Configured GPIB Interface BoardTo connect the GPIB-130 to a specially equipped National Instruments GPIB interface board,complete the following steps.Caution: Failure to follow these steps for installation may result in damage to your GPIB-130and your system.1. Make sure that the power switch on the side panel is in the off position.2. Turn off the computer containing the interface board.3. Unplug the power cord of the computer.4. Push either phono-jack connector of the special power cord into the 5VDC jack of theGPIB-130.5. Turn the phono-jack connector so that it screws into the threading on the 5VDC jack onthe GPIB-130.