National Instruments PC-DIO-24/PnP Figure 3-2. Digital I/O Connections

Chapter 3 Signal Connections
PC-DIO-24/PnP User Manual 3-6
© National Instruments Corporation
Figure 3-2. Digital I/O Connections
In Figure 3-2, port A is configured for digital output, and portB is
configured for digital input. Digital input applications include receiving
TTL signals and sensing external device states such as the state of the
switch in Figure 3-2. Digital output applications include sending TTL
signals and driving external devices such as the LED shown in this
figure.
PC-DIO-24/PnP
I/O Connector
+5 V
+5 V
LED
TTL Signal
41
43
45
47
67
71
73
69
50, 100
+5 V
Jumper
Selectable (W1)
100 kΩ100 kΩ100 kΩ100 kΩ
100 kΩ100 kΩ100 kΩ100 kΩ
PPI
Port B
PB<7..4>
PPI
Port A
PA<3..0>
GND
Switch