NI 9421/9423
10
ni.com
Connect the o
u
tp
u
t of the so
u
rcing-o
u
tp
u
t device to DI on the
NI 9421/9423. Connect the common of the external device to the
COM terminal or pin. Refer to Fig
u
re 3 for an ill
u
stration of
connecting a device to the NI 9421/9423.
Figure 3.
Connecting a Device to the NI 9421/9423 (3-Wire Device Shown)
NI 9421/9423
+
–
Sourcing-Output
Device
COM
DI
External
Power
Supply
