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Chapter 4
Signal Connections
©
National Instruments Corporation
4-19
Digital I/O Signal Connections
The 6034E and 6035E both have digital I/O signals DIO<0..7> and DGND.
DIO<0..7> are the signals making up the DIO port, and DGND is the
ground reference signal for the DIO port. You can program all lines
individually to be inputs or outputs. Figure 4-9 shows signal connections
for three typical digital I/O applications.
Figure 4-9.
Digital I/O Connections
Figure 4-9 shows DIO<0..3> configured for digital input and DIO<4..7>
configured for digital output. Digital input applications include receiving
TTL signals and sensing external device states such as the state of the
switch shown in the figure. Digital output applications include sending
TTL signals and driving external devices such as the LED shown in the
figure.
LED
+5 V
TTL Signal
+5 V
DIO<4..7>
DIO<0..3>
DGND
Switch
I/O Connector