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Chapter 4 Signal Connections
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National Instruments Corporation 4-21 PCI-6023E/6024E/6025E User Manual
Digital I/O Signal Connections
All Boards
All boards have digital I/O signals 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 all lines individually to be inputs
or outputs.
Figure 4-10 shows signal connections for three typical digital I/O
applications.
Figure 4-10.
Digital I/O Connections
Figure 4-10 shows DIO<0..3> configured for digital input and DIO<4..7>
configured for digital output. Digital input applications include receiving
TTL signals and sensing external device states such as the state of the
LED
+5 V
TTL Signal
+5 V
DIO<4..7>
DIO<0..3>
DGND
Switch
I/O Connector
PCI.book Page 21 Wednesday, September 16, 1998 9:09 AM