Connecting Digital I/O Signals - National Instruments NI 6711 User Manual

Chapter 4 Digital I/O

Connecting Digital I/O Signals

Caution Exceeding the maximum input voltage ratings, which are listed in the
specifications of each AO Series device, can damage the DAQ device and the computer.
NI is not liable for any damage resulting from such signal connections.
Analog Output Series User Manual
The DIO signals, P0.<0..7>, are referenced to D GND. You can
individually program each line as an input or output. Figure 4-2 shows
P0.<0..3> configured for digital input and P0.<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.
+5 V
LED
+5 V
Switch
Figure 4-2. Digital I/O Signal Connections
TTL Signal
I/O Connector
4-6
P0.<4..7>
P0.<0..3>
D GND
AO Series Device
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