SPDT Smart Relay

Aqara Products
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1

Question for Aqara. Any plans for a smart relay which supports SPDT (COM + NO + NC)?

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2

Thanks for asking. I’ll forward this to the relevant product team. Do you have any other thoughts about this?

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Hello.

If you need a common COM for NO and NC, then such a function can be implemented in T2.

IMG_20250812_065635
IMG_20250812_065635795Ă—279 13.1 KB

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Can you please clarify? As far as I understand, the relay in the T2 is a SPST relay.

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I want to implement three-way switching.

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Theoretically, if you have a common COM, by selecting the interlock function you simulate NO and NC.

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Hello, @European.
ATTENTION!!! When using the interlock mode, do not use the button located on the relay housing. This button will not provide this mode, its function is to control Off/On of two relay contacts. For interlock, when pressing this button, you need to make emergency automation, which will immediately turn off two channels.

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I think relying on an emergency automation to fix this bug is also bad advice. If it takes 1.5s to execute the emergency automation then that could be too slow. A lot of damage can occur in 1.5 seconds.

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Hello, emergency automation works (practically) instantly. For comparison, video without automation.

Video with automation.

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Would you bet the life of your connected electronic devices on it really being “instant”? Would you bet the liability of your advice or Aqara on it being “instant”.

I would not.

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@gafich10 Thanks for sharing. Is the interlock function working within the device, e.g. it works independent of the hub even if the hub goes down?

@AqaraSting13 SPDT relays would still be preferable with separate COM being the most flexible solution.

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14

Hi, I’ll check it when I get home and reply. I’ll do it the day after tomorrow.

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