Renard ZC question

[xmus]

Question -> If Pin 3 and Pin 6 are used for ZC, which is ZC and which is ground?

Reviewing the Ren8 and Ren64:
http://christmasinshirley.com/wiki/index.php?title=Image:Renard8-20070228b.gif
http://christmasinshirley.com/wiki/index.php?title=Renard64

3=ZC?
6 = no connect? (assumes other common ground between boards).


Thanks,
Dave

[P. Short]

Yes... 3 = ZC, 6 = NC

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Phil

[xmus]

Thanks

[wbuehler]

Let me start by saying please forgive a Noob question like the one to follow
I have been reading a lot of information on various controllers and have even ordered soem PCB's for my 2008 plans. But I have been reading about the Renards and one thing keeps popping up what is a ZC signal and why is it needed?

P.S. This site is addactive, I'm just getting started and already I'm hooked

Thanks

Bill

[xmus]

http://en.wikipedia.org/wiki/Zero_cross_circuit

sorry I'm in a hurry. That is all I have time for at the moment.

[P. Short]

Zero-crossing signal - a pulse that indicates when the instantaneous AC power line voltage is going through zero (this is when the voltage on the Hot and Neutral lines are roughly the same).

With the Renard16 and Renard24 boards this signal is generated on-board, so you don't have to worry about it (so long as you follow the assembly and connection instructions). For Renard64 and Ren-C this is usually generated by the transformer board (Ren-T), and is connected to the various Renard boards through the RJ45 connectors.

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Phil

[wbuehler]

Ah

I see said the blind man

Thanks

Bill

[AI]

OK I have a Question; If we use the ZC signal generated off the 1st bd. and send it down the cat 5 to the others, will it still work right if the next bd is on the other 220VAC pole and out of phaze with the 1st board making the ZC or would the ZC be the same? AI

[P. Short]

Are you talking about in the US, where the two phases are almost universally 180 degrees out from each other? The zero-crossing occur at the same point in time for both phases, so everything works fine.

If you are talking about those places in the world where the phases differ by 120 degrees, then it doesn't work. But that is a totally different discussion.

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Phil

[AI]

Are you talking about in the US, where the two phases are almost universally 180 degrees out from each other? The zero-crossing occur at the same point in time for both phases, so everything works fine.

If you are talking about those places in the world where the phases differ by 120 degrees, then it doesn't work. But that is a totally different discussion.

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Phil

Yes Phil; I was talking about the US. Just curious if it would efect it. Thanks for all your hard work and Marry Christmas. AI