Connecting a Differential Device to the NI 9411
You can connect differential devices to the NI 9411.
Figure 3.
Connecting a Differential Device to the NI 9411
–
+
External
Power Supply
COM
V
sup
COM
NI 9411
+
–
DIa
+5 V
out
DIb
Differential
Device
+5 V
Reg
Receiver
Circuitry
+5 V
GND
The NI 9411 compares the difference between DIa and DIb to the
digital logic levels to determine if the signal is in the high range
or low range.
Tip
Refer to the device datasheet at
ni.com/manuals
for the digital logic levels.
NI 9411 Getting Started Guide
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© National Instruments
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13