Thanks, but it's still not clear in my mind regarding physically hooking up the ALARM+ and _. Just looking at the ALM+/_ as a single issue.

On the PDMX126 there is a Fault-Active LOW pin amongst the e-stop pin and a few GND's. So I will setup all the AM882's to go fault Active low in the AM882 software. Then I connect all the ALM+, ALM- , ALM +ALM- together in series, from the last ALM- goto the GND pin on controller that's next to fault pin, and from Fault pin goto ALM+ for the first drive. Where is the signal coming from because the Fault pin is an INPUT active low? Does the AM882 make it's own fault signal, or does it just ground a signal that needs to already be there?

If I look at the AM882 schematic in both cases they have the PUL+signal connected to the ALM+ signal. Is this the source for the voltage? what happens between the pulses ie - can't the pulse naturally drop to zero which would trigger the ALM active low, just because the pulse is low?

If I have to connect a PUL+ to the ALM+, do I only do that before the first driver, as it is now effectively powering the series chain of all the ALM+/_'s. Can't this create an issue if Pul+ gets grounded to another driver when the other driver faults?

Then also - If I am daisy chaining the PUL-/DIR- to GND, should that be done seperately for each drive, or can I daisy chain all of them together also and then plu into any GND on the PDMX 126?
The AM882 schematic has all the PIL'DIR/ENA/ALM -, all connected together, then all going to earth - but on the PDMX I have earths in the J13 ( e-stop area ) and I also have individual PC GNDfor each of the driver setp/dir signals, so I figured that the DIR/SteP- should go together to their respective VCC GND, and the ALM- with be seriesed and then run to a GND in the Fault area ( J13 )

These are the bits I need explained. as far as using the fault pin, I could use the ERR+, and ERR-, but really have no idea on what the difference between that is, and using the Fualt pin.

Nick