Proper Opto Isolation - CNCzone.com-The Largest Machinist Community on the net!

07-23-2007, 09:18 PM

Karl_T

Join Date: Mar 2004

Location: Dassel,MN,USA

Posts: 1,318

Proper Opto Isolation

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I asked a question about wiring a galil 1900 board on the Galil forum and I'm puzzled by the caution statement at the end of the responce
http://www.galilmc.com/cgi-bin/ubb/u...c;f=1;t=000408

I'll explain my wiring concept. I use supply 24 volt DC to all input switches whever posssilbe. Then from the switch to the Opto input. From the other connection on the opto input, a wire is run to the dc common terminal block. Most switches are wired NC.

Does this have a weakness in opto isolation?

Karl

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