BL200BN is distributed IO coupler based on BACnet IP technology, it supports BACnet IP protocol and widely used in building Automation, HAVC, etc. It adopts dual network port technology of unique MAC layer data exchange technology to realize cascade, the downtime of intermediate equipment does not affect the data transmission of subsequent equipment. Up to 32 IO such as AI, DI, DO, thermal resistance, thermocouple, RS485, and other types of IO can be extended