Hi monualone,
The 9205 module has 2 PFIs that can be used to import external signals such as sample clock or trigger.
So yes you can acquire voltage with an external trigger and an external clock using the 9205.
In LabVIEW you have an example that demonstrate how to do this (LabVIEW>>Help>>Find Examples) then go to the DAQmx part and take a look at Voltage-Continous input VI.
or you can use examples available on NI website : http://www.ni.com/example/30009/en/
Have a good day.
Regards,
Valentin
Certified LabVIEW Architect
Certified TestStand Architect
Certified LabWindowsCVI Developer
National Instruments France