Kirk Wallace wrote:
> For this relay:
>
> http://document.sharpsma.com/files/s108t01_e.pdf
>
> what does "Non-zero crossing functionary" mean?
>   
Some SSRs are designed to ONLY turn on at the zero crossing of the AC 
voltage.
The others are usually called "random turn-on", meaning that they turn 
on whenever the control signal is applied.
If you want to control a load by phase control, like a light dimmer, 
then this is necessary.  I think that is what the above Chinglish is 
trying to convey in your quote.

All SCR and Triac SSRs turn off at the current zero-crossing of the AC 
cycle.


Jon

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