NI 9219E Operating Instructions and Specifications
18
ni.com
Digital In Mode
Digital In mode has a 60 V unipolar threshold that you can set
in software. Refer to the software help for information about
configuring the Digital In threshold. Visit
ni.com/info
and enter
cseriesdoc
for information about C Series documentation.
Digital In mode is supported only in CompactRIO systems.
Refer to Figure 7 for an illustration of the connections.
Open Contact Mode
In Open Contact mode, the NI 9219E sources a current between the
HI and LO terminals and determines if the two terminals are open
or closed based on the measured current through the terminals.
When the circuit is open, make sure no more than ±60 V is sourced
across the switch. Open Contact mode is supported only in
CompactRIO systems.
Figure 13.
Connections in Open Contact Mode
HI
LO
ADC
I
NI 9219E
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