NI DAQPad-MIO-16XE-50, Руководство пользователя

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Chapter 3 Connecting the Signals
© National Instruments Corporation 3-3 DAQPad-MIO-16XE-50 User Manual
Table 3-1. DAQPad-TB-52 Signal Descriptions
Signal Name Reference Direction Description
AIGND — — Analog Input Ground—These signals are the reference point
for single-ended measurements and the bias current return
point for differential measurements. All three ground
references—AIGND, AOGND, and DGND—are connected
together on the DAQPad-MIO-16XE-50.
ACH<0..15> AIGND Input Analog Input Channels 0 through 15—Each channel pair,
ACH<
i, i +8> ( i = 0..7), can be configured as either one
differential input or two single-ended inputs.
AISENSE AIGND Input Analog Input Sense—This signal serves as the reference
node for any of channels ACH <0..15> in NRSE
configuration.
DAC0OUT AOGND Output Analog Channel 0 Output—This signal supplies the voltage
output of AO channel 0.
DAC1OUT AOGND Output Analog Channel 1 Output—This signal supplies the voltage
output of AO channel 1.
EXTREF AOGND Input External Reference—This is the external reference input for
the AO circuitry. This functionality is
not available on the
DAQPad-MIO-16XE-50.
AOGND — — Analog Output Ground—The AO voltages are referenced to
this node. All three ground references—AIGND, AOGND,
and DGND—are connected together on the
DAQPad-MIO-16XE-50.
IEX+ IEX– Output Current excitation—This signal provides 100 µA of external
current excitation.
IEX– — — Current excitation return—This signal provides the current
return point for the external current excitation.
DGND — — Digital Ground—These signals supply the reference for the
digital signals at the DAQPad-TB-52 as well as the +5 VDC
supply. All three ground references—AIGND, AOGND, and
DGND—are connected together on the
DAQPad-MIO-16XE-50.
DIO<0..7> DGND Input or
Output
Digital I/O signals—DIO6 and 7 can control the up/down
signal of general-purpose counters 0 and 1, respectively.
+5V DGND Output +5 VDC Source—This signal is fused for up to 250 mA
of +5 V supply.
SCANCLK DGND Output Scan Clock—This signal pulses once for each A/D
conversion in the scanning modes when enabled. The
low-to-high edge indicates when the input signal can be
removed from the input or switched to another signal.