7i76E input from common cathode integrated stepper

Sorry if this has been answered before. I did search but.....

I have a stepper with an integrated driver being driven from a Mesa 7i76E in 'common cathode' mode (as per the diagram below). The 'common cathode' GND being the one from the stepper driver part of my 7i76E.

I'd like to attach the stepper's alarm signal to a 7i76E input.

My trusty multi-meter says that the stepper GND and Field GND are connected on the 7i76E and the VCC for the Alarm circuit would come from the field power 24V.

Can I do it like this without encouraging the magic smoke to escape?

This would be better, adding another resistor and having the two outputs separate, i have no idea what PED does, and having it disable the machine would not be nice. You can use just one resistor and one input if you do not need PED, whatever that is, (probably "drive OK?"), just cut the line in red.

FWIW PED is 'In Position' (which I'm not planning on using or connecting to).

The inbuilt controller actually has ALM+, ALM-, PED+ and PED- connectors so I can ignore PED.

The diagram initially confused me and I mis-drew what I was thinking but your comments made me look again and it makes a bit more sense like so.

Thanks for the confirmation.

ruffle wrote:

PED is 'In Position'

Well, in that case the above schematics will cause a lot of trouble for poor users who try to stick to it.
In position that is active while the motor is not moving would cause a fault, preventing it from ever moving !

Yet another underpaid Asian Proof reader I guess

Yup. PED+ and PED- will not be connected.

Thanks again.