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

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Chapter 3 Connecting the Signals
© National Instruments Corporation 3-5 DAQPad-MIO-16XE-50 User Manual
PFI6/WFTRIG DGND Input
Output
PFI6/Waveform Trigger—As an input, this is one of the PFIs.
As an output, this is the WFTRIG signal. In timed AO
sequences, a low-to-high transition indicates the initiation
of the waveform generation.
PFI7/STARTSCAN DGND Input
Output
PFI7/Start of Scan—As an input, this is one of the PFIs.
As an output, this is the STARTSCAN signal. This signal
pulses once at the start of each AI scan in the interval scan.
A low-to-high transition indicates the start of the scan.
PFI8/GPCTR0_SOURCE DGND Input
Output
PFI8/Counter 0 Source—As an input, this is one of the PFIs.
As an output, this is the GPCTR0_SOURCE signal.
This signal reflects the actual source connected to the
general-purpose counter 0.
PFI9/GPCTR0_GATE DGND Input
Output
PFI9/Counter 0 Gate—As an input, this is one of the PFIs.
As an output, this is the GPCTR0_GATE signal. This signal
reflects the actual gate signal connected to the
general-purpose counter 0.
GPCTR0_OUT DGND Output Counter 0 Output—This output is from the general-purpose
counter 0 output.
FREQ_OUT DGND Output Frequency Output—This output is from the frequency
generator output.
Table 3-2. I/O Signal Summary of the DAQPad-TB-52
Signal Name Drive
Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V)
Sink
(mA
at V)
Rise
Time
(ns) Bias
ACH<0..15> AI 20 G
Ω
in parallel
with 100 pF
25/15 — — — ±3 nA
AISENSE AI 20 G
Ω
in parallel
with 100 pF
25/15 — — — ±3 nA
AIGND AO — — — — — —
DAC0OUT AO 0.1
Ω
Short-circuit
to ground
5 at 10 5 at 10 2 V/µs —
Table 3-1. DAQPad-TB-52 Signal Descriptions (Continued)
Signal Name Reference Direction Description