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The following figure represents the NI PXIe-2747 in the 8×1 multiplexer topology.
Call the niSwitch Connect Channels VI or the niSwitch_Connect function to connect channels in this topology. If applicable, you must call the niSwitch Disconnect Channels VI or the niSwitch_Disconnect function to disconnect an existing connection before you call the niSwitch Connect Channels VI or the niSwitch_Connect function.
|Note The niSwitch Disconnect Channels VI or the niSwitch_Disconnect function does not operate the relay until the next niSwitch Connect Channels VI or the next niSwitch_Connect function is executed. Thus, one channel of the 8×1 multiplexer is always connected to a common channel. If you have reset the module or called the niSwitch Disconnect All Channels VI or the niSwitch_DisconnectAll function, you do not need to disconnect the default channel from COM upon initial connection.|
The following sequence of tasks illustrates the VI/function calls necessary to make consecutive connections—one between CH1 and COM and the other between CH2 and COM: