Question

Hello,
I'm trying to use the modbus gateway on a RUT955 (firmware RUT9XX_R_00.06.06.1). I have a modbus RTU temperature sensor. I recover the temperatures in a random way (sometimes I recover the value, sometimes not).
According to your wiki, it is necessary to use a termination resistor. Unfortunately, I don't see this resistor on my PCB :

Thank you in advance for your help.

Answer 1

Hello,

On the RUT955 improved housing design PCB the terminator connections are missing. Since the housing of the RUT955 improved model is not disassembled, the termination resistor must be connected to the outside of the device by connecting a through-hole 100 ohm resistor to the terminal contacts. The connection of the external resistor is shown in the figure:

Comments

Thanks for your reply and the update of your wiki