On Wed, 7 Jul 2021, andy pugh wrote:
Date: Wed, 7 Jul 2021 15:25:37 +0100 From: andy pugh <bodge...@gmail.com> Reply-To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] spindle orientation help for a 7i77 card looking for configs to studyOn Wed, 7 Jul 2021 at 15:20, Peter C. Wallace <p...@mesanet.com> wrote:
Also some NPN prox's have built in pullups so may source 24V to the output when off.
Would a 5.2V zener at the terminal block be a sensible precaution?
Yes, a Zener woud protect the encoder input (actually the 7I77 encoder input chip is OK to 25V, but the 2K pullup resistor would be damaged) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." ?? George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination.
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