Problems whit the error pin.

New motor drivers, new problems with the alarm signal / error pin.
Hello.
I have four drivers on my MK3 / 9 controller.
I use the ALM signals. With the old drivers everything was as it should.
When a motor went into alarm, the EStop was activated.

Now with the new drivers, the CL57Y only works as long as no more than two drivers are connected.
I also tried "Normally Closed", but the ALM signal from the driver is ignored by the error pin.
I've tested all drivers, I've checked all cables. I checked the driver settings several times and also changed them to test.

So alo my question, what am I doing wrong.

How are alarm signals connected? My guess is that you connected open collector signal in parallel.

I've tried both variants. I have now switched to NC and optocoupler. Now it works.