I have 10 separate systems that I am using a “Industrial Relay Controller Board 32-Channel SPDT + UXP Expansion Port” with a " RS-485 Node Serial Network Communications Module SN65HVD12D". I am using the factory settings and baud rates on the RS485 comm modules and relay controllers. The only thing I do is configure the jumpers for 1,2,3 so that only 3 is jumpered because it is the first and only comm module on the network.
I have had 3 RS485 comm modules go dark and not respond to any messages. This seems to happen randomly and always after the systems have been up and running for a while. I have tried to factory reset the RS485 comm module and have had no luck. I ended up buying new RS485 comm modules and replacing them, and the new ones plug and play with no issues.
I have now had another RS485 comm module go dark and I need to find an alternate solution than just replacing the modules. Any thoughts on this would be appreciated.