Use NI-ModInst to query the system for information about installed NI Modular Instruments devices.

niModInst Open Installed Devices Session VI
Creates a handle to a list of installed devices supported by the specified driver. Call this VI and select the name of a National Instruments instrument driver, such as NI-SCOPE, from the driver control. This VI searches the system and constructs a list of all the installed devices that are supported by that driver, and returns both a handle and the number of devices found. The handle is used with other functions to query for attributes such as device name and model, and to safely discard the list when finished.
niModInst Get Installed Device Attribute (poly) VI
Returns an attribute (either an integer or a string) specified by the attribute ID parameter for a device specified by the session in and index in parameters.
niModInst Close Installed Devices Session VI
Cleans up the NI-ModInst session created by a call to niModInst Open Installed Devices Session. Call this VI when you are finished using the session handle and do not use this handle again.

NI-ModInst LabVIEW VI Reference

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