Modbus RTU RS485 sensor two wires Yellow A Green B

[Carlos]

found this wiki TRB255 RS485/Modbus 2 Wire-network wiring

The mentioned example is a broken link.

I tried connecting a RS485 sensor, but when i try reading it i get an error

Is there any guide on how to connect it?

[Martynas]

Hello, @Carlos

Apologies for a delay. From the provided image, it seems that the RS485 wiring is incorrect. For proper communication, the wiring should follow the setup as shown in the diagram below:

In brief, D+ and R+ should be connected together, and D- and R- should also be connected together.

Let me know if the issue persists after making the change.

Kind regards,

[Carlos]

Thank you!