National Instruments DAQ Series User Manual

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National Instruments DAQ Series User Manual Manual pdf 22 page image

Chapter 3 Connecting Signals© National Instruments Corporation 3-3 DAQCard-700 User ManualThe connector pins can be grouped into AI signal pins, DIO signal pins, andTIO signal pins. Signal connection guidelines for each of these groups areincluded in the following pages.Connecting Analog Input SignalsPins 1 through 18 are AI signal pins for the ADC. Pins 1 and 2, namedAIGND, are an analog common signal. You can use these pins for a generalanalog power ground tie to the DAQCard-700. Pins 3 through 18 are theACH<0..15> signal pins. These pins are tied to the AI channels of theDAQCard-700 through 4.7 kΩ series resistors. These resistors limit theinput current to the multiplexer. Refer to Appendix A, Specifications, forinput ranges and maximum ratings for the analog inputs, ACH<0..15>.30–37 DOUT<0..7> Output Output Digital Data Lines 0 through 7—DOUT7 is the MSB,DOUT0 the LSB.38 OUT1* Output Counter 1 Output—This pin is the inversion of counter 1output.39 EXTINT* Input External Interrupt—This pin is used for input of the externalinterrupt signal.40 EXTCONV* Input External Control—This pin is used for input of the externalcontrol signal to trigger A/D conversions.41 OUT0 Output Counter 0 Output—This pin is the output of counter 0.42 GATE0 Input Counter 0 Gate Input—This pin is the gate input for counter 0.43 OUT1 Output Counter 1 Output—This pin is the output of counter 1.44 GATE1 Input Counter 1 Gate Input—This pin is the gate input for counter 1.45 CLK1 Input Counter 1 Clock Input—This pin is the clock input forcounter 1.46 OUT2 Output Counter 2 Output—This pin is the output of counter 2.47 GATE2 Input Counter 2 Gate Input—This pin is the gate input for counter 2.48 CLK2 Input Counter 2 Clock Input—This pin is the clock input forcounter 2.49 +5 V Output +5 Volts—This pin provides +5 VDC. The +5 V supply isfused at 1 A, which is the maximum current available.50 DGND — Digital Ground—This pin is connected to the digital groundsignal.* Indicates that the signal is active low.Pin Signal Name Direction Description