How does a BMS talk to a Controller? In HVAC systems, seamless communication between a Building Management System (BMS) and local controllers (like those for AHUs) is vital. Using industry-standard protocols like BACnet, BMS platforms send and receive real-time data, commands, and setpoints to manage temperature, air quality, and system status. But it’s not just about language — it’s about syntax, structure, and connectivity. From Ethernet/IP to RS-485, we break down how this communication actua

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