National Instruments DAQ PCI E Series User Manual

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National Instruments DAQ PCI E Series User Manual Manual pdf 67 page image

Chapter 4 Signal ConnectionsPCI E Series User Manual4-24 ©National Instruments CorporationFigure 4-9 shows how to make analog output connections and theexternal reference input connection to your PCI E Series board.Figure 4-9. Analog Output ConnectionsThe external reference signal can be either a DC or an AC signal. Theboard multiplies this reference signal by the DAC code (divided by thefull-scale DAC code) to generate the output voltage.Digital I/O Signal ConnectionsThe digital I/O signals are DIO<0..7> and DGND. DIO<0..7> are thesignals making up the DIO port, and DGND is the ground referencesignal for the DIO port. You can program all lines individually to beinputs or outputs.Caution: Exceeding the maximum input voltage ratings, which are listed inTables 4-1, 4-2, and 4-3 can damage the PCI E Series board and thecomputer. National Instruments is NOT liable for any damages resultingfrom such signal connections.+-+-+-Channel 0Channel 1ExternalReferenceSignal(Optional)LoadLoadVOUT 0VOUT 1 DAC1OUTAOGNDDAC0OUTEXTREFAnalog Output ChannelsE Series BoardVref!