Hi Peter, 400 mA per output should be OK unless you have mode than 3 outputs on at > once > per chip (the cards are tested at 500 mA) >
That's excellent news. One less thing to worry about :) > Do make sure that the solenoids have flyback diodes > I'll do that. Thanks Peter for the quick response. Stay well! El dom, 15 may 2022 a las 21:30, Peter C. Wallace (<p...@mesanet.com>) escribió: > On Sun, 15 May 2022, Leonardo Marsaglia wrote: > > > Date: Sun, 15 May 2022 20:59:34 -0300 > > From: Leonardo Marsaglia <ldmarsag...@gmail.com> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> > > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net > > > > Subject: [Emc-users] 7i72 max output current question > > > > Hi guys, I hope you're all doing great > > > > This could be probably for Peter but most of you will know the answer so > > here it goes. > > > > I have to drive some 24 VCC pneumatic electrovalves and I would like to > use > > 7i72's outputs directly. Each valve consumes 400 mA and the 7i72 max > > current per output is 300 or 350 mA. But, the short circuit protection > per > > output is triggered at 800 mA. So I was thinking in two possible ways to > > drive the valves: > > > 400 mA per output should be OK unless you have mode than 3 outputs on at > once > per chip (the cards are tested at 500 mA) > > Do make sure that the solenoids have flyback diodes > > > > > > 1- to accommodate one valve per output (without exceeding the 1.4 amps of > > max current per output chip) and hope the 400mA are not too much for the > > overcurrent monitoring. > > > > 2- to drive every valve with two consecutive outputs to divide the > current > > in half so every output would only see 200 mA (again without exceeding > the > > max current per output chip). > > > > What do you guys think? I'm trying to avoid to install any extra > circuitry > > if possible. > > > > Thank you as always for your help! > > > > _______________________________________________ > > 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. > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
