National Instruments DAQCard-1200 - Manual (Page 38)

Chapter 3 Signal Connections
DAQCard-1200 User Manual 3-16 © National Instruments Corporation
Figure 3-8 illustrates signal connections for three typical digital I/O
applications.
Figure 3-8. Digital I/O Connections
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.
TTL Signal
22 PB0
13
DGND
I/O Connector
DAQCard-1200
LED
+5 V
+5 V
29 PB7
30 PA0
Port C
PC <0..7>
Port B
PB <0..7>
Port A
PA <0..7>