Manuals for compact Daq modules

[tmcneil]

Are there actual manuals for the modules purchased for the compact Daq system?

I purchased a cDAQ-9174 compact DAQ chassis, a NI-9421 Digital Input module and an NI-9229 Analog module to use for motor BEMF testing. 

I want to measure the BLDC hall sensor outputs with the DI module, while measuring the voltage generated by the BEMF using the AI module. 

I need these to be synchronized, unsynchronized is pointless. 

The cDAQ manual is pretty thorough, but it references Device Routes and PFI and all the capabilities of the cDAQ chassis, but from what I can tell, none of them connect to the NI-9421 or NI-9229 modules.

From what I can tell, using the Device Routes tab on the MAX application, there are no signals routed (directly or Indirectly ) from the NI-9421 module to anything else on the Chassis. 

When I look at the Device Routes for the NI=9229 module, nothing is Directly or Indirectly routed anywhere in the Chassis or to the NI-9421 module. 

I would like to know what signals these two modules actually have, however I cannot locate a useful manual. The only documentation I can find on the NI website is a page that has Safety Guidlines, Electromagnetic Capability Guidelines, Preparing the Environement, Pinout, Grounded Connections , Floating Connections etc. The one link that shows promise is "Where to Go Next" , but that takes me to a picture of something that looks neat, but no links or information 

Are there any manuals that talk about the triggering, sampling clocks, timing, Labview programming , cDAQ interfaces etc for these modules? I need to know what these modules connect to on the cDAQ backplane, what can be used to trigger them and how to coordinate a sample clock. 

Thanks in advance

Tom

[RIObotics]

Hi Tom,

A couple of other resources to add to your existing CompactDAQ manuals:

NI-DAQmx related documentation

https://www.ni.com/docs/en-US/bundle/ni-daqmx/page/daqhelp/related_documentation.html

Getting Started with NI-DAQmx

https://www.ni.com/en-us/support/documentation/supplemental/06/getting-started-with-ni-daqmx--main-p...

NI-DAQmx is the underlying software driver for all NI DAQ products (including CompactDAQ), NI doesn't make this very obvious for a new user, but the answers to your questions are all included in some form of the various NI-DAQmx pieces of documentation.

Another related topic, CompactDAQ module synchronization also is dependent on which modules you are using, as well as which slot you put them in.  Looks like the NI-9229 uses a Delta-sigma ADC, you can check on here for synchronizing delta-sigma modules:

https://www.ni.com/en-us/support/documentation/supplemental/21/signal-based-synchronization-of-analo...

You don't really need to use PFI pins for synchronization, there should some internal clock signals that you can use within the same CompactDAQ chassis.