Heat bed thru relay

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Re: Heat bed thru relay

Postby mattrsch » Tue Apr 01, 2014 4:34 pm

airkuld wrote:Regressedee mentioned a flyback diode. In searching for a wiring schematic, I did see mention of installing a diode across the load where the load in that case was a motor. As I understand it, the diode is to block a backfeed of energy from a collapsing magnetic field such as a coil or motor winding would provide when normal current flow is shutoff. Because there is no coil in the SSR and not much of a field built around the heated bed, do you think this is necessary?


Your are correct, the diode is to protect your electronics form the field colapse of the coil in a mechanical relay. You won't need it in the SSR. Happy printing!
mattrsch
 
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