Figure 4.
Connecting a Single-Ended Device with Open Collector
Outputs
Vsup
COM
Vout
2 A
max
Vin
GND
Open
Collector
Device
External
Power
Supply
NI 9361
OUT
DI0+
+
–
COM
DI0–
+5 V
An open collector device does not actively drive the signal high
and relies on an external pull-up. The NI 9361 provides a 5 V
pull-up on each DI+ pin that can be enabled individually to pull
the signal high.
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NI 9361 Getting Started Guide