National Instruments NI 9411 - Page 14

Connecting a Single-Ended Device to the
NI 9411
You can connect single-ended (TTL) devices to the NI 9411.
Figure 4. Connecting a Single-Ended Device to the NI 9411
–+
External
Power Supply
COM
Vsup COM
NI 9411
Receiver
Circuitry
out
Single-Ended
Device
DIa
DIb
+5 V
Reg
+5 Vout
GND
+5 V
The NI 9411 compares the difference between DIa and COM to
the digital logic levels to determine if the signal is in the high
range or low range.
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