Connecting Digital I/O Signals - National Instruments NI 6115/6120 User Manual

Connecting Digital I/O Signals

Caution Exceeding the maximum input voltage ratings, which are listed in Table 4-3, can
damage the NI 6115/6120 and the computer. NI is not liable for any damage resulting from
such signal connections.
LED
+5 V
© National Instruments Corporation
The DIO signals are 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 groups of individual lines to be inputs or
outputs.
Figure 4-7 shows signal connections for three typical DIO applications.
+5 V
TTL Signal
Switch
I/O Connector
DGND
NI 6115/6120
Figure 4-7. Digital I/O Connections
4-15
Chapter 4 Connecting Signals
DIO<4..7>
DIO<0..3>
NI 6115/6120 User Manual