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EMS/MGC ↔ SBAU: Modbus TCP/IP (via RJ45 Ethernet)
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SBAU ↔ SBCU: CANbus
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SBCU ↔ SBMU: CANbus
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SBMU ↔ Cells: Voltage and temperature monitoring
Cluster – Definition
A cluster represents one battery rack (Cabinet), managed by one SBCU and composed of multiple SBMUs and battery cells (Packs).
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Each SBCU communicates with SBAU via CANbus.
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Each SBAU supports up to 32 clusters (Cabinets).
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Clusters are individually controlled and monitored by EMS via Modbus.
The SBAU acts as a Modbus TCP/IP server. The EMS/MGC communicates as the Modbus TCP/IP client.