Quote Originally Posted by Doddy View Post
Now, I don't know where to start with the driver. Quickly looking back I thought you was looking at LCDA86's - but one of your diagrams shows a LCDA86H - I think that 'H' is significant here as it raises the operating voltage and introduces a AC-supply option to what was previously a DC supply-only, and at a higher voltage. Clearly the non-H variant would require you to rectify the supply and you'd be so far beyond the rating I'd expect you to blow the drivers. If you do have the 'H' variants, then I think you're on the ragged edge.

As far as I know there as never been an "S" version of this drive. I think you may be confusing these with the AM882S which did have an AC "H" version. These drives take both AC or DC.

Now your right on the edge with the voltage so your incoming supply must be on the high side. These drives will run at that voltage and won't give you any trouble provided your incoming supply doesn't fluctuate. The drives do have over-voltage protection, so they should protect them selfs from slight peaks and you will probably get a drop when under load. Only you know your incoming supply so only you can evaluate the risk.

The other option if you don't want to risk it is to throw a bridge rectifier and some Caps on it and go with DC.

If it helps you decide all I can say is I've run these drives at the ragged edge on volts before (I live next to the transformer and my supply can hit 256Vac so my supply is like a box of chocolates.!) without any troubles but I've also blown one of the smaller 50v versions by accidentally pushing too far so they only protect upto a point.!

Or buy a lower-rated supply that suits your incoming supply better. ( If it helps I'll take that one from you )