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EMS/MGC ↔ SBCU: Modbus TCP/IP (via RJ45 Ethernet)
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SBCU ↔ SBMU: CANbus
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SBMU ↔ Cells: Voltage and temperature monitoring
Cluster/Pack – 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 EMS/MGC (via Modbus TCP/IP (via RJ45 Ethernet).
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Cabinets are individually controlled and monitored by EMS via Modbus.
The SBCU acts as a Modbus TCP/IP server. The EMS/MGC communicates as the Modbus TCP/IP client.