Yes, the data sheet mentions phase angle control applications, so it is the style that turns on immediately, vs. the style that waits for the next zero crossing.
Steve Stallings > -----Original Message----- > From: John Kasunich [mailto:jmkasun...@fastmail.fm] > Sent: Sunday, April 12, 2009 10:05 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] [OT] AC Solid State Relay > > Kirk Wallace wrote: > > For this relay: > > > > http://document.sharpsma.com/files/s108t01_e.pdf > > > > what does "Non-zero crossing functionary" mean? > > > I'm pretty sure it means that the Triac will fire as soon as > the LED lights up, regardless of where that is in the AC line > cycle. A zero-crossing SSR will wait until the AC voltage > across the Triac is about to cross zero before it turns on. > Waiting for a zero-crossing tends to reduce electrical noise > and possibly stress on the Triac and/or the load (depends on > the nature of the load). > > Regardless of the type of turn-on, once the Triac is on, it > won't turn off until the current through it goes to zero - > even if the LED is off. > That's why SSRs only work for AC - in a DC circuit the > current won't go to zero. > > Hope this helps, > > John Kasunich > > > -------------------------------------------------------------- > ---------------- > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > http://p.sf.net/sfu/www-ibm-com > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
