Changing Output Voltage Threshold on PCIe-6509 in DAQexpress to 3.3V

[TechL]

Hello All!

I'm trying to figure out how to change the output voltage from 5V to 3.3V in DAQexpress on a PCIe-6509. I'm new to this and there doesn't seem to be a straightforward way to do this. It appears I need to make a VI, drag the task into the Diagram window, and then change the logic family to 14621.

I can't seem to find the pull-down menu in the VI to do this. Any help or suggestions would be much appreciated.

Thanks!

[Salpathare]

Hey TechL,

I took a look at the device specifications for the PCIe-6509.

http://www.ni.com/pdf/manuals/372117c.pdf 

Page 27 indicates that a digital output high can be anywhere between 3.4-5.5 volts

Because this is a digital device you do not have the ability to configure the voltage output level.

Best regards,

Salil Pathare

Applications Engineer

National Instruments

866-275-6964

support@ni.com 

[TechL]

Hello Salpathare,

Can the DAQmx Power Up States be implemented in DAQExpress? On this page here it appears that changing the logic family may solve my problem.

http://zone.ni.com/reference/en-XX/help/370469AC-01/lvdaqmx/mxsetpwrupstates/#DAQmxSetPowerUpStates(...)

Thanks,

TechL

[Salpathare]

According to page 22 of the document.

"You can program the DIO lines on the NI 6509 to power up at a predefined state: input, high output, or low output. Programmable power-up states ensure that the NI 6509 powers up in a known state."

There are not any states to set levels.

Best regards,

Salil Pathare

Applications Engineer

National Instruments

866-275-6964

support@ni.com