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NI 9437 Getting Started Guide
Connecting Sourcing-Output Devices
You can connect sourcing-output devices to the NI 9437. You must
connect a supply voltage to the V
SUP
pin on the NI 9437. Input
channels on the NI 9437 read ON or OFF depending on the
threshold set by the V
SUP
pin. The V
SUP
threshold is approximately
2/3 of the supply voltage on the V
SUP
pin.
Figure 3.
Connecting a Sourcing-Output Device
NI 94
3
7
2/
3
≥
+
–
Extern
a
l
Power
Su
pply
COM
V
S
UP
DI
S
o
u
rcing-O
u
tp
u
t
Device
