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NI ISM-7401/7402 User Manual
Connecting the Enable signal as shown in Figures 10 and 11 causes the drive to disable when the
proximity sensor activates.
Figure 10.
Connecting an NPN Type Proximity Sensor to an Input
Figure 11.
Connecting a PNP Type Proximity Sensor to an Input
Note
When the proximity sensor activates, the input closes.
Connecting the Digital Output
The NI ISM-7401/7402 has a digital output labeled OUT. This output closes to signal a fault
condition.
Figure 12.
Internal Circuit Diagram
Use this output to drive LEDs, relays, and the inputs of other electronic devices like PLCs. The
positive collector and negative emitter terminals of the output transistor are available at the
connector. This allows you to configure the output for current sourcing or sinking.