Can I re-direct the output of a UMI-7764 AO to another board (6233) AO?

[icebear]

I have an existing application which I am trying to update to isolate the motor / encoder / servo amplifier from PC ground.  To this end I have installed opto-isolation circuitry and power isolation on the UMI-7764 to isolate my digital IO signals.  I still have a leakage path from the AO on the 7764 to the servo amplifier.  I do have a PCI-6233 in this setup, used for measuring isolated analog signals.  Is it possible to modify my labview control software to re-direct the AO from the 7764 to the 7233 AO to isolate the signal using the Configure Axes Resources.flx?  Otherwise a hardware route will need to be taken using an isolation amplifier (not preferred).
 Thanks in advance for any insight.

-Stefan

[iRish]

Hi Stefan,

Unfortunately you will not be able to route the AO Ground through your 6233 if you are using our FlexMotion subVIs.  These VIs have been specially designed to work with our Motion Controller cards so will only communicate with them.  You mention using our UMI 7764, that is simply a breakout box, which motion controller card are you using?

Also, what are you using to confirm that the AO Ground is 'leaking'?

[icebear]

Thanks Rishi,

Sorry, I am using aPCI-7344, although I am only using the first Axis.  I have been working through isolation issues on this test setup for some time and check isolation with a Fluke DMM.  What I found to alert me to the "leak" is a potential of about 300 mV from the computer chassis ground on the AO signal at the servo controller.  Based on your reply, it will be easiest to just a ISo124 isolation amplifier on the analog output, but will require a couple of DC/DC converters to handle the polarity changes.  Thanks for your help. 

-Stefan