Digital Input/Output Connections
LVTTL Signal
+2.7 V
+5 V
LED
DIO0 as Input
DIO1 as Input
GND
DIO2 as Output
NI 9381
Device 3
Device 2
Device 1
DIO channel direction is software selectable. Changing the
direction on any channel does not affect the direction on the other
channels.
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NI 9381 Getting Started Guide