There are ways of matching data signal voltages between disparate components. 
Here's a patent on one way to do it, likely it's the basis for various 
commercial products. https://patents.google.com/patent/US7023242

    On Thursday, April 15, 2021, 1:45:18 AM MDT, andrew beck 
<[email protected]> wrote:  
 
 Hey gene and peter.

Well that's good to know that the ency card only supports 5v.  So that's a
no show.  All good I'll use them for something else I guess.

So gene.
First off my encoder has a b Z push pull single ended outputs.

Looks like your solution is the plan.
I have a spindle sensor already on the spindle.  And my vfd can output a
and b signals.  Fine.  Just no Z signals.  So I'll use A and B for speed
and the proxy sensor for rigid tapping plus spindle orientation.

I'll be in touch in a few days.  Once I get this encoder card working.

Regards

Andrew  
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