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Dear all,

I use the TRB255 in Modbus serial connection.  On the TRB I have 4wirings (R+ R- D+ D-). I try to connect it on a Modbus Device in RS485. On this device I have 2wirings +/ -/ GND.

How can I found the right connection?

Best Regards.

Many thanks.

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Hi,

In our wiki, you should find all the information you need to connect RS485 devices.

Please take a look and see if you can find what you're looking for there:

https://wiki.teltonika-networks.com/view/RUT955_RS232/RS485#RS485

EB.