2012/8/24 Peter C. Wallace <p...@mesanet.com>: > On Fri, 24 Aug 2012, Viesturs L?cis wrote: > >> Date: Fri, 24 Aug 2012 17:13:22 +0300 >> From: "[UTF-8] Viesturs L?cis" <viesturs.la...@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] Quick question about 7i37 >> >> Hello! >> >> I looked at 7i37 manual, but did not find it explained: >> How am I supposed to connect input signal from source, whose ground is >> connected to 7i37 power supply ground? Is it sufficient to connect >> only the signal wire, or must I connect also GND? I could not find it >> anywhere, if GND on optoisolators' input side is isolated from power's >> GND or no. > > > You need to connect GND. All 7I37/7I37TA inputs and output are isolated from > PC GND and from each other. > > Note, the 7I37COM is different, it has common + side on outputs and common - > on inputs > > So for a active high input you connect INx- to GND and INx+ to the signal > (that also has GND as its common) >
Thank You, got it! It is the 7i37com that had it much easier to wire up inputs... -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
