When I installed the DYN4 drives I didn't have enough I/O to wire up the drive fault alarms. I've since picked up a C10 board and using Port 3 on an ESS to allow for more I/O. I've wired Pin 18 ALM from the DYN4 to a 5V input and Pin 5 COM from the DYN 4 to the input pin. This is per the diagram received from DMM when I bought the hardware. When I use Mach 3 diagnostic, I see that the input turns on randomly even though the drive is not faulted, so clearly I'm doing something wrong.

Can anyone share how they wired the Alarm signal on the DYN4 drive to a breakout board? Also, which inputs are typically used for Drive alarms? Mach3 did not have a logical choice to select, so I'm simply using a random unused Input. My goal is for Mach3 to E-Stop in the event of a drive fault. Does Pull Up or Pull Down matter for these inputs? Lastly, should the breakout board be set as COM=GND or COM =5V? I've tried various combinations, and nothing seems to matter.