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<br />Energport Inc Page 10 /24 <br />3.3 String Control Tray <br />B+ <br />B- <br />Fuse <br />HV+ <br />HV- <br />SBMU AC/DC <br />CT <br />AC 120VCAN BUS DC24V <br />EMS <br />Slaver <br />RS-485 <br />EPOLAN <br /> <br />Figure 7 Electrical diagrams in single control tray <br /> <br />In the diagram above, the 24VDC Power supply is powered by a 120VAC input. The 24VDC is <br />used to power the string control units，The CT is used to sample the string current. The SBMU <br />collects all module and cell data which consolidates the voltages and temperatures. EMS-Slaver <br />oversees the whole batteries string’s management which includes receiving and analysis the data <br />uploaded by SBMU, communicating with other equipment though Ethernet and RS485. <br /> <br />Figure 8 String control tray <br /> <br />73