I purchased a "Shelly Plus 0-10 V Dimmer" but it was a mistake because it's output is not "0-10VDC" Analog Signal which i can measure with a voltmeter.
Did you check if "Shelly Dimmer 0/1-10V PM" has a real "0-10 VDC" output which you can measure with your voltmeter ?
Did you finalize this application ? Is it okay ?