Re: Automatic Garage Door

[Stu Alden <foo@xxxxxxx>]

I believe most need a single, momentary contact relay -- essentially to
replicate the effect of the regular hardwired pushbutton control.

The temporary closing of the circuit launches the door to go from open
to closed or vice versa.


> Hi,
>
> I would like to know the typical interface for automatic/electric garage
> door. Is it controlled using 2 relays for power and direction (closing and
> opening) or maybe with just one relay (relay on = closing, relay off =
> opening)?
>
> Thanks in advance for any input regarding this matter.
>
> Rgds,
> W. Utomo
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