GND from the RS485 adapter must be connected to the relay module.
The RS485 bus needs to be terminated in order to function. Fail-safe resitors are recommended.
Application note:
https://www.st.com/resource/en/applicat ... ronics.pdf
The RS485 bus needs to be terminated in order to function. Fail-safe resitors are recommended.
Application note:
https://www.st.com/resource/en/applicat ... ronics.pdf
Statistics: Posted by fchk — Fri Jul 04, 2025 2:38 pm