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CT1150, 4 Serial communication management server is a gateway device for distributed control system to access third-party devices, which can meet the requirements of protocol conversion, real-time data acquisition, control, centralized management and other functions of the system network for the third-party controller with MODBUS-RTU protocol, general I/O, intelligent instrument, etc. It adopts the mature technology platform of the current industrial control system: embedded high-performance processor and embedded operating system, intelligent communication redundancy technology, field bus technology, port protection technology, etc., which has the characteristics of powerful function, stable operation and high reliability.