S Series Physical Channels

Dev1 in physical channel names is the default device name for S Series devices. You can change these names in MAX.

Analog Input

An S Series device has between two and eight analog input physical channels named Dev1/ai0 to Dev1/ai7.

Analog Output

An S Series device that supports analog output has two analog output physical channels named Dev1/ao0 and Dev1/ao1.

Digital Input and Output

All S Series devices have eight lines of digital input and output named Dev1/port0/line0 through Dev1/port0/line7. These lines belong to a single port, and the physical channel Dev1/port0 refers to all eight lines at once.

Counter Input and Output

All S Series devices have two counter/timers referred to by the physical channel names Dev1/ctr0 and Dev1/ctr1. 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 three primary terminals associated with each counter. These are the terminals used as the SOURCE, GATE and OUT functions. NI-DAQmx has default values for these terminals. For counter input tasks, if you know whether your signal provides the SOURCE or GATE function and wire your signal to the default, you do not have to set the Input Terminal attribute/property.

Refer to S Series Signal Connections for Counters for more information.