myDAQ has two analog input channels, myDAQ1/ai0 and myDAQ1/ai1. These channels support only the differential terminal configuration. You can configure the first channel, myDAQ1/ai0, as the positive channel of a differential pair. Use only the physical channel name of the positive channel (not both) when creating a differential channel.

myDAQ also has a DMM physical channel, myDAQ1/dmm, available from the device. On myDAQ, the DMM physical channels cannot be used in the same task with other channels. There are also two audio input channels, myDAQ1/audioInputLeft and myDAQ1/audioInputRight. These channels support only the referenced signal-ended terminal configuration. Analog input tasks do not work simultaneously with audio input.

myDAQ has two analog outputs with analog output physical channels named myDAQ1/ao0 and myDAQ1/ao1. myDAQ also has two audio output channels, myDAQ1/audioOutputLeft and myDAQ1/audioOutputRight. Analog output tasks do not work simultaneously with audio out.

myDAQ has eight lines of digital input and output named myDAQ1/port0/line0 through myDAQ1/port0/line7. These lines belong to a single port, and the physical channel myDAQ1/port0 refers to all 8 lines at once.

myDAQ has one counter/timer referred to by the physical channel name myDAQ1/ctr0. Unlike the other I/O types, these physical channel names do not refer to terminals on the I/O connector but instead to circuits within the device. There are four primary terminals associated with each counter. These are the terminals used as the SOURCE, GATE, AUX, and OUT functions. NI-DAQmx has default values for these terminals. For counter input tasks, if you know whether your signal provides the SOURCE, AUX, or GATE function and wire your signal to the default, you do not have to set the Input Terminal attribute/property.