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National Instruments Corp.
11
NI 9411 Operating Instructions and Specifications
Connecting Single-Ended Devices to the NI 9411
Yo
u
can connect single-ended (TTL) devices to the NI 9411.
Connect the signal to the DIa pin, b
u
t do
not
connect a signal to the
DIb pin in the pair. Yo
u
must
leave the second signal in the set of
signals
u
nconnected. For example, if yo
u
connect a single-ended
signal to the pin for DI0a, leave DI0b
u
nconnected. Fig
u
re 4 shows
a possible config
u
ration.
Figure 4.
Connecting a Single-Ended Device to the NI 9411
COM
V
sup
COM
NI 9411
Receiver
Circuitry
out
Single-Ended
Device
DIa
DIb
+5 V
Reg
–
+
+5 V
out
External
Power Supply
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