I just thought the beginning of the thread got a bit complicated with using relays and the such. I don't know if the op had used a different control board or something and it had me a little confused. I know how to use a transistor and a relay but couldn't work out the alarm port on the AM882.

I expected it to be simple open circuit and closed circuit when alarming or not. What threw me off the most was putting a multi-meter across the terminals didn't show continuity or only a few millivolts on DC. I figured there wasn't enough voltage to do any damage so I just give it a go running a jumper from the E-Stop on my Parallel Breakout board, "ALM +" then "ALM -" back to the GND on my break out board. What do you know it worked then I found it also worked jumping them all together so all good..

Happy Days

Joel