Is there a solution when I don't know the IP address of the range sensor?

If you want to find the IP address, please use the application software “IP Discovery”.
If you want to initialize, connect the IP reset input of the wiring to the minus- side.
At that time, connect the input common plus to the plus+ side.
If you turn the input on for 2 seconds or longer and then turn it off, UST will restart.