Figure 3-8. Digital I/O Connections - National Instruments DAQCard-1200 User Manual

Chapter 3 Signal Connections
+5 V
LED
DAQCard-1200 User Manual
Figure 3-8 illustrates signal connections for three typical digital I/O
applications.
TTL Signal
+5 V
I/O Connector
In Figure 3-8, port A is configured for digital output, and ports B and C are
configured for digital input. Digital input applications include receiving
TTL signals and sensing external device states such as the switch in
Figure 3-8. Digital output applications include sending TTL signals and
driving external devices such as the LED shown in Figure 3-8.
22 PB0
29 PB7
13
DGND
30 PA0
DAQCard-1200

Figure 3-8. Digital I/O Connections

3-16
Port C
PC <0..7>
Port B
PB <0..7>
Port A
PA <0..7>
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