HTZSafe Driveway Motion Sensor Shelly Wiring

Hi Everyone,
I have recently purchased the HTZSafe Wireless driveway beam sensor.

The alarm base station has outputs for Common, Normally Closed NC and Normally Open NO with these triggering each time the beam is broken and an alarm is sent to the base station.

I am wanting to connect a Shelly Plus 1 to the alarm base so that I can get notification in Home Assistant when ever the driveway beam sensors are broken, however I have tried numerous combinations in the Shelly (Both wire connections and Shelly Config) and I can not get the Shelly relay to turn on when the NO circuit is activated by the HTZSafe alarm.

Has anyone had any luck in connecting the HTZSafe driveway beam sensor to a Shelly? Any assistance or guidance would be appreciated.

This is the Image of the HTZSafe alarm box:

Hello dbr3006,

Can you sketch or describe what you tried?
Those appear to be dry contacts, so if the shelly is a battery one that will accept 14v DC, then a simple circuit should be available. I would not use a mains powered relay as there is risk of shock or shorting to ground if you do.

Hi @Sir_Goodenough ,
Thank you for your reply.

I am using the Shelly 1 plus powered via 12V DC - Picture of Shelly below.

I have tried connecting the NO from the HTZSafe alarm to the I - Input relay terminal on the Shelly and the COM from the HTZSafe to the O - Relay output terminal on the Shelly.
Also, I tried connecting the NO from the HTZSafe alarm to the SW - Switch input terminal on the Shelly 1.

I read on this forum that someone has got this working by connecting to the sensor input terminal and the COM terminal on a ZEN17 to get this working, however I am not using a ZEN17.

Picture and legend for Shelly Plus 1:
image

image

I and O on the shelly are the outputs of the shelly relay. You probably won’t use them at all. You need the dry contacts on the driveway thing to control the inputs to the shelly and make the shelly turn on and off. When that turns the shelly on, HA will know and that is your sensor.

I’m not an owner of a shelly, so I would feel better if someone that has one of these responds, but that is how generally you need to use this.

Someone else please help with the actual wiring.

Thank you for replying and the information you have provided.
Hopefully someone else who might of achieved this can assist further :slight_smile:

Thank you so much @Karosm that works perfectly.

You’re welcome!
Ps. Shelly is overkill, you could get same with $2 dev board and Esphome.

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