National Instruments NI PCI-6110 - Manual (Page 45)

Chapter 4 Connecting Signals
© National Instruments Corporation 4-15 NI PCI-6110/6111 User Manual
Digital I/O Signal Connections
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 all lines individually to be inputs or outputs.
Caution Exceeding the maximum input voltage ratings, which are listed in Table 4-3, can
damage the NI PCI-6110/6111 and the computer. NI is not liable for any damage resulting
from such signal connections.
Figure 4-7 shows signal connections for three typical DIO applications.
Figure 4-7. Digital I/O Connections
NI PCI-6110/6111
+5 V
LED
TTL Signal
+5 V
Switch
I/O Connector
DGND
DIO<0..3>
DIO<4..7>