I have a Modbus concentrator that has filed on a electrical service with Comment interfaces and MODBUS RTU interface. I am trying to replace the obsolete Modbus Concentrator with a device that will read the MODBUS RTU traffic from PGMII electrical controllers and send them via a RTA protocol gateway that will allow me to send the data collected to a BAS interface. Has anyone found a replacement for this concentrator or has any have a controller that they have used to integrate this. I believe that this Modbus concentrator is a Modbus master I have attached some pics for clarity