Chapter 3 Signal Connections
© National Instruments Corporation 3-3 DAQCard-1200 User Manual
Signal Connection Descriptions

The following table describes the connector pins on the DAQCard-1200

front I/O connector by pin number and gives the signal name and the

significance of each signal connector pin.

Pins Signal Name Direction Reference Description
1–8 ACH<0..7> AI AGND Analog Channel 0 through 7—Analog input channels 0
through7.
9 AISENSE/AIGND AI AGND Analog Input Sense/Analog Input Ground—Connected to
AGND in RSE mode, analog input sense in NRSE mode.
10 DAC0OUT AO AGND DAC0 Output—Voltage output signal for analog output
channel0.
11 AGND N/A N/A Analog Ground—Analog output ground reference for
analog output voltages. This signal is the bias current return
point for differential measurements.
12 DAC1OUT AO AGND DAC1 Output—Voltage output signal for analog output
channel1.
13 DGND N/A N/A Digital Ground—Voltage ground reference for the digital
signals and the +5 V supply.
14–21 PA<0..7> DIO DGND Port A 0 through 7—Bidirectional data lines for port A.
PA7is the MSB, and PA0 is the LSB.
22–29 PB<0..7> DIO DGND Port B 0 through 7—Bidirectional data lines for port B.
PB7is the MSB, and PB0 is the LSB.
30–37 PC<0..7> DIO DGND Port C 0 through 7—Bidirectional data lines for port C.
PC7is the MSB, and PC0 is the LSB.
38 EXTTRIG DI DGND External Trigger—External control signal to trigger a
DAQoperation.
39 EXTUPDATE* DI DGND External Update—External control signal to update
DACo utputs .
40 EXTCONV* DIO DGND External Convert—External control signal to time
A/Dconversions (DI) and drive SCANCLK when you use
SCXI(DO).
41 OUTB0 DO DGND Output B0—Voltage output signal of counter B0.
42 GATB0 DI DGND Gate B0—External control signal for gating counter B0.
43 OUTB1 DIO DGND Output B1—Voltage output signal of counter B1 when
selected as output (DO). This is the external control signal
for timing an interval cycle when selected as input (DI).
44 GATB1 DI DGND Gate B1—External control signal for gating counter B1.