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ni.com
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NI 9401 Operating Instructions and Specifications
Figure 4 illustrates how to connect several types of digital devices
to the NI 9401.
Figure 4.
Connecting Digital Devices to the NI 9401
TTL
S
ign
a
l
+5 V
+5 V
LED
DIO0
as
Inp
u
t
DIO1
as
Inp
u
t
COM
DIO7
as
O
u
tp
u
t
NI 9401
Dev
3
Dev 2
Dev 1
