Advantech PCI-1720 Manuale Utente Pagina 17

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Chapter 3 Signal Connections 13
I/O Connector Signal Descriptions
Signal
Name
Reference Direction Description
AI<0…31> GND Input
Analog Input Channels 0 through 31.
Each channel pair, AI<i, i+1> (i = 0, 2,
4...30), can be configured as either two
single-ended inputs or one differential input.
GND - -
Ground. These pins are the reference
points for single-ended measurements and
the bias current return point for differential
measurement.
EXT_TRG GND Input
A/D External Trigger. This pin is the
external trigger signal input for the A/D
conversion. A low-to-high edge triggers A/D
conversion to happen.
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