I just received the PR28-17 to use for monitoring a well pump. The provided documentation I believe is for a different, although very similar product. There’s jumpers on this board. “pull-up” and “I2C 5V”. From looking at the mechanical drawing, it appears as though I can power this device off the I2C bus, but the provided documentation says that a 12V power supply is required.
I’m guessing that I could install the jumper for I2C 5v, and connect the i2c 5v wire to the Raspberry Pi 5V, and it would work. Is this correct?