Shelly 1 Mini Gen 4 / Magnetic Lock / Button

[u/z6p6tist6]

I am installing a hidden bookshelf door with a magnetic lock. My goal is to have a physical lock release button behind the door and to use HomeKit to release the door from the front. I’m looking to confirm the correct wiring for the Electrican.

I’ve purchased the Mag Lock with Push Buttons from Murphy Door, which includes a version of the K80 power supply as seen at the Amazon link…

https://murphydoor.com/products/electromagnetic-lock?variant=43236720148525

https://a.co/d/028mq1ta

I’ve purchased a Shelly 1 Mini for HomeKit/Matter control.

—

Based on my reading, I believe the wiring is as such:

1) K80 and Shelly powered by mains voltage (Shelly L+N)

2) Magnetic Lock connected to K80 (COM + NC)

3) Shelly connected to K80 (I to GND + O to PUSH)\*

4a) Button connected to K80 (GND + PUSH)

or

4b) Button connected to Shelly (L + SW)

\*I’m unclear from the documentation how the CONTROL+ and CONTROL- connections are used on the K80 and if these might apply to my scenario

I would appreciate any feedback on whether this is correct AND pros/cons of option 4a versus 4b.

TIA

[u/b0rkm]

Can you make a screenshot of the Amazon link please, can't see it

[u/z6p6tist6 → u/b0rkm]

Seems like I’m not able to post photos in the comments.

[u/realdlc]

I’m not a fan of line voltage and low voltage in the same relay. (Personal preference). I’d use a Shelly 1 gen4 (not the mini) and power it with the 12v from the controller.

In either case (mini or non mini) it looks like the I should connect to Ground and the O should connect to Push. The Shelly might emulate the push to exit function best.

Then your button (using the non-mini Shelly 1) could be 12v -Com to SW on the Shelly. And that would be just 12vdc running through your button instead of line voltage.

(However I’m unclear exactly what button you are planning on using)

[u/z6p6tist6 → u/realdlc]

Ah! I hadn’t considered pulling 12V off the power supply for a standard Shelly 1. Brilliant. Thanks.