Physical Channel names on PXIe-4140

[Ali=!2]

I am using PXIe-4140 modules on PXIe-8880 controller. I am trying to change the sampling rate to catch fast events with the nidaqmx library in python. However, I can't seem to figure out how to access the specific channels to adjust the rate. I tried different variations of channel names, but I always get the same error. Attached are the code I am working with and error I get. 

[santo_13]

Wait, what??

4140 is an SMU and you need to use niDCPower drivers to control them and NOT DAQmx

[Ali=!2]

I see. What would be the best way of adjusting the sampling rate/measurement rate using niDCPower? 

[ZYOng]

See line 17 of Examples — NI-DCPower Python API 1.4.5 documentation