NI DAQ 6052E, Руководство пользователя

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Chapter 4 Connecting the Signals
NI 6052E User Manual 4-4 ni.com
DAC1OUT AOGND Output Analog Channel 1 Output—This pin supplies the voltage
output of AO channel 1.
EXTREF AOGND Input External Reference—This input is the external reference input
for the AO circuitry.
AOGND — — Analog Output Ground—This node serves as the reference for
AO voltages. All three ground references—AIGND,
AOGND, and DGND—are connected on the NI 6052E.
DGND — — Digital Ground—This pin supplies the reference for the digital
signals at the I/O connector and the +5 VDC supply. All three
ground references—AIGND, AOGND, and DGND—are
connected on the NI 6052E.
DIO<0..7> DGND Input or
Output
Digital I/O Signals—DIO 6 and 7 can control the up/down
signal of general-purpose counters 0 and 1, respectively.
+5V DGND Output +5 VDC Source—These pins are fused for up to 1 A of
+5 V supply. The fuse is self-resetting.
SCANCLK DGND Output Scan Clock—This pin 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.
EXTSTROBE* DGND Output External Strobe—This output can be toggled under software
control to latch signals or trigger events on external devices.
PFI0/TRIG1 DGND Input
Output
PFI0/Trigger 1—As an input, this is either a PFI or the source
for the hardware analog trigger. PFI signals are explained in
the
Connecting Timing Signals section. The hardware analog
trigger is explained in the Analog Trigger section of
Chapter 3, Hardware Overview .
As an output, this is the TRIG1 signal. In posttrigger DAQ
sequences, a low-to-high transition indicates the initiation of
the acquisition. In pretrigger applications, a low-to-high
transition indicates the initiation of the pretrigger conversions.
PFI1/TRIG2 DGND Input
Output
PFI1/Trigger 2—As an input, this is a PFI.
As an output, this is the TRIG2 signal. In pretrigger
applications, a low-to-high transition indicates the initiation
of the posttrigger conversions. TRIG2 is not used in
posttrigger applications.
PFI2/CONVERT* DGND Input
Output
PFI2/Convert—As an input, this is a PFI.
As an output, this is the CONVERT* signal. A high-to-low
edge on CONVERT* indicates that an A/D conversion is
occurring.
Table 4-2. I/O Connector Signal Descriptions (Continued)
Signal Name Reference Direction Description