Proximity wiring for limit switches, safety relay and a contactor

**Clive S** · 10-05-2019

Originally Posted by CharlieRam

Hmm....so should I use a contactor instead of a relay and if thats the case should I also put it on the 240v a.c. side instead of the 70vdc? Does the safety relay wiring look right from the charge pump output? Oh and one last thing....are the alarm outputs for the drive NC or NO? I had a look in the data sheet but couldn't work it out??
Cheers,
Charlie.

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Charlie. Re the drive alarm contacts they can be either NO or NC and can be changed in the software of the drive with a rs232 cable plugged into the side socket on the drive. but IIRC I thought there was a speed limit of about 300 rpm for the stall detection. But I don't see this in the manual anymore !!

It is a little confusing the way you have drawn the circuit as you stated

Another pole connects the 70v side of the toroidal transformer to power the steppers.

which would be AC but then you mention 70vdc ie DC. As John has indicated it is not good to switch DC with a relay.

**CharlieRam** · 10-05-2019

Originally Posted by Clive S

Charlie. Re the drive alarm contacts they can be either NO or NC and can be changed in the software of the drive with a rs232 cable plugged into the side socket on the drive. but IIRC I thought there was a speed limit of about 300 rpm for the stall detection. But I don't see this in the manual anymore !!

It is a little confusing the way you have drawn the circuit as you stated which would be AC but then you mention 70vdc ie DC. As John has indicated it is not good to switch DC with a relay.

That's more down to my diagram skills sorry! The drives take a.c. or d.c. but the Toroidal psu is rectified and is 70vdc so it looks as though it will be better to use the solenoid to power a contactor on the 240v side.
These drives dont have stall detection as far as I'm aware, maybe you're thinking of the Leadshine ones?

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