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UBS with gate photocells



Hi, I am trying to integrate Smarthings with my gate via a Fibaro UBS, I already have a UBS setup to read the Gate open closed via A magnetic reed switch and it works perfectly with smartthings using the Cjcharles device handler. I am now trying to get a reading of when the gate photocells are triggered so that I know when someones arriving by adding another UBS.

The gate controller board has 24v AC, so I am using a power supply converter to power the UBS with 24v DC from the gate board. The gate board has a connection to the Photocell through Foto 2 (8) and Com (11), the photocell also takes 24V AC from 17 & 18, I am connecting the UBS int1 to Foto 2 and the power and gnd from UBS is fed by 24v DC converter.  

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The problem is I get a constant cycling of the contact as Open/Closed, I suspect its something to do with the AC/DC interface, but I'm at the limits of my knowledge now.

I put a multimeter between 8 & 11 and don't seem to be getting a voltage, so don't believe its a dry/wet contact problem. When I test continuity between 8 & 11 I get a reading when I block the photocell.


I tried a test setup with just photocells and UBS both powered by 24v DC and worked great, so I think its the gate controller causing the problem.

I'm a little out of my depth with electronics.


Sorry if I've over complicated, can anyone advise?



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