© National Instruments
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4-1
4
Analog Input
Refer to one of the following sections, depending on your device:
•
Analog Input on MIO X Series
Devices
—NI 632
x
/6341/6343/6345/6351/6353/6355/6361/6363/6365/6375 devices can
be configured for single-ended and differential analog input measurements.
•
Analog Input on Simultaneous MIO X Series
Devices
—NI 6346/6349/6356/6358/6366/6368/6374/6376/6378/6386/6396 devices can
be configured for differential analog input simultaneous sampled measurements.
Analog Input on MIO X Series Devices
Figure 4-1 shows the analog input circuitry of MIO X Series devices.
Figure 4-1.
MIO X Series Analog Input Circuitry
The main blocks featured in the MIO X Series device analog input circuitry are as follows:
•
I/O Connector
—You can connect analog input signals to the MIO X Series device through
the I/O connector. The proper way to connect analog input signals depends on the analog
input ground-reference settings, described in the
Analog Input Ground-Reference Settings
section. Also refer to Appendix A,
, for device I/O connector
pinouts.
•
Mux
—Each MIO X Series device has one analog-to-digital converter (ADC). The
multiplexers (mux) route one AI channel at a time to the ADC through the NI-PGIA.
•
Ground-Reference Settings
—The analog input ground-reference settings circuitry selects
between differential, referenced single-ended, and non-referenced single-ended input
modes. Each AI channel can use a different mode.
DIFF, R
S
E,
or NR
S
E
I/O Connector
AI <0..207>
M
u
x
AI
S
EN
S
E
AI GND
NI-PGIA
AI Termin
a
l
Config
u
r
a
tion
S
election
Inp
u
t R
a
nge
S
election
ADC
AI FIFO
AI D
a
t
a
Summary of Contents for DAQ X NI 634 Series
Page 1: ...PXIe 6349...
