NI SCXI-1194/1195 Quad 4×1 Multiplexer Topology
The following figure represents the NI SCXI-1194/1195 in the quad 4×1 multiplexer topology.
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Making a Connection
In this topology, you can connect channels by calling the niSwitch Connect Channels VI or the niSwitch_Connect function.
For example, to connect ch1A to comA, call niSwitch_Connect (vi, "ch1A", "comA"). If you now want to connect ch2A to comA, first disconnect the existing connection. The sequence of calls for this task is as follows:
niSwitch_Disconnect (vi, "ch1A", "comA")
niSwitch_Connect (vi, "ch2A", "comA")
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Note niSwitch_Disconnect (vi, "ch1A", "comA") does not operate the relay until the niSwitch_Connect(vi, "ch2A", "comA") is executed. One channel of each 4×1 multiplexer is always connected to its respective common channel. |
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Note For an initial connection, you do not need to disconnect the default channel (ch0) from COM after the module has been reset or a call to the niSwitch Disconnect All Channels VI or the niSwitch_DisconnectAll function has been made. |
When scanning the NI SCXI-1194/1195, a typical scan list entry could be ch1A->comA;. This entry routes the signal from ch1A to comA.