National Instruments AT-MIO-16X - Manual (Page 54)

Chapter 2 Configuration and Installation
AT-MIO-16X User Manual 2-32 © National Instruments Corporation
Figure 2-12. Digital I/O Connections
In Figure 2-12, port A is configured for digital output, and port B 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 2-12. Digital output applications include sending TTL
signals and driving external devices such as the LED shown in
Figure 2-12.
Power Connections
The I/O connector provides +5 V from the PC power supply. This +5 V
is referenced to DIG GND and can be used to power external digital
circuitry.
Power rating 1.0 A at +5 V ±10 %, fused
LED
+5 V
TTL Signal
+5 V
Port A
ADIO<3..0>
Port B
BDIO<3..0>
DIG GND
Switch
I/O Connector
AT-MIO-16X Board