The folder named DCU contains the DCU driver subVIs and examples 
that demonstrate the use of these driver subVIs. Locate the DCU 
folder into the user.lib directory of the LabVIEW file system 
(usually found at C:\Program Files\National Instruments\LabVIEW x.x\user.lib)

Connect the DCU with power to the DIG Channel of the SensorDAQ. 
Run the DCU examples and review the SensorDAQ DCU Manual for 
information about performing digital output and creating control 
projects.

Software steps required before running the DCU examples:

1. LabVIEW 7.1 or newer installed.
2. The DAQmx driver for SensorDAQ properly installed. The NI DAQmx software must be version 8.6.1 or newer.
3. SensorDAQ driver subVIs copied into the user.lib directory of the LabVIEW file system.

Further instructions regarding software installation of DAQmx and 
the SensorDAQ driver subVIs can be found in the SensorDAQ Users Manual.

Note that a bug in the NI-DAQmx software versions 8.6 and 8.7 
turn on line 3 of the DCU when the analog sensors are configured 
(in the DCU INIT driver subVI). A workaround to this problem is 
to Reset the SensorDAQ at the end of the program (in the DCU STOP 
driver subVI). Unfortunately, the Reset currently turns on line 
5. Look for a fix in upcoming versions of NI-DAQmx.