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NI 9411 Operating Instructions and Specifications
8
ni.com
meas
u
res whether the difference between the DIa and DIb pins is
greater than or less than the digital logic levels. If the difference
between the pins is within the inp
u
t high range, the channel
registers as high. If the difference between the pins is within the
inp
u
t low range, the channel registers as low. Refer to the
Specifications
section for more information abo
u
t digital logic
levels. Fig
u
re 2 shows a possible config
u
ration.
Figure 2.
Connecting a Differential Device to the NI 9411
COM
V
sup
COM
NI 9411
+
–
DIa
+5 V
out
DIb
–
+
Differential
Device
External
Power Supply
+5 V
Reg
Receiver
Circuitry
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