Dev1
in physical channel names is the default device name for USB
Series DAQ devices. You can change these names in MAX.
The USB-9211, USB-9215, and USB-9233 have four analog input physical
channels named Dev1/ai0
to Dev1/ai3
. The USB-9201 and
USB-9221 have eight analog input physical channels named Dev1/ai0
to Dev1/ai7
.