On 6 January 2016 at 14:01, Gene Heskett <ghesk...@wdtv.com> wrote: >> Ideally it needs to be a force-guided relay, with the main power feed >> (or surrogate thereof) through a second set of terminals
> That thought has crossed my mind too, but the power relays I have, with > an aux set of contacts that could feed the interlock, are all NO types. > NC versions seem rare, and pricy. $100 USD range. Where are you looking? I am using one of these: http://uk.rs-online.com/web/p/non-latching-relays/0548022/ But I paid £10 for it from eBay, with a screw-terminal base included. It is _not_ rated to switch 300V DC, so I just ensure it is never asked to switch when there is 300V across it. Or, in fact, more than 5V. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
