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240v coil relay board


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Can't see why you shouldn't parallel the SSR outputs in this scenario.  In power switching you wouldn't want it as the vague turn-on time would mean that ONE device was handling all the inrush before the others caught up. But in this situation it's irrelevant, the only issue might be trying to diagnose which one was short if there was a failure..

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10 hours ago, PeterW said:

 

So I've got a slightly different issue that the MVHR boost is a no volt connection and we want a "fan" switch in the grid in the kitchen. 

 

I will have a similar issue when I come to integrate my MVHR into my overall control. The unit has a serial interface for a NAME and a set of contact connections to force boost, bypass etc. The simplest approach for me is to use a couple of SonOffs or my own project box. In the latter case it would be my own custom code, and in the former it would be a case of re flashing the SonOffs with a standard MQTT driver.

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