S330 2k wired only doorbell (without battery) issue

Hi All,

Ive purchased the Eufy Dual 2k camera doorbell S330 (wired only) version with chime included. I set it up successfully with the app by powering it with the included usb cable.

I plan to wire it directly using a wall plug type transformer directly to the 2 terminals behind the doorbell ( as in picture)

I connected the A & B from the transformer to A & B on the back of cameradoorbell respectively.

The doorbell doesn’t power up.

Ive tested the transformer with a multimeter and its working.

I live in Dubai and the power output from wall socket is 230v 50hz AC.

As per my knowledge, the output power specifications of the transformer meet the camera doorbell inputs specifications.

Can anyone help me out if anything im doin is wrong??

Thanks.