The Honeywell Thermal Solutions S7810M1029 Modbus Data Control Bus Module is a communication interface designed for compatible combustion and burner control systems. It enables data exchange between supported control devices and monitoring equipment through a Modbus communication network, helping coordinate system information and operating status. Commonly used in commercial boilers, ... https://www.partshnc.com/honeywell-thermal-solutio-s7810m1029-modbus-data-controlbus-module