Cat 7 Cable for encoders?


#1

Does anyone see any issues with using Cat 7 cable (8 wires) for two encoders? I figured you can combine the power and ground to reduce the number of wires from 10 to 8. If shielded I think that would prevent interference if you are also running your motor cables next to it.

Thoughts?


#2

Yeah I think this might work. Don’t forget to ground the shield on the ODrive side.


#3

It will work best with differential encoders, actually. That way you can put each differential signal on a twisted pair and dramatically reduce common-mode noise.


#4

@Wetmelon I am currently using the CUI ATM102 is that a differential encoder?

@madcowswe thanks!


#5

Should I put both “A”, “B” and “Z” signs in one twisted pair in the CAT 7 or would that possibly present an issue?

As in Encoder 1 A and Encoder 2 A are in one twisted pair?


#6

For best noise immunity, you should put GND in all the solid colors, and send signal in all the striped colors only (or vica versa).


#7

Awesome thanks! It turns out I had other issues too so I am working on figuring everything out!