Power line communication for DC shutdown equipment. Communication signal, physical layer
Power line communication for DC shutdown equipment. Communication signal, physical layer
1 Scope This document applies to photovoltaic (PV) system components and communication networks supporting the communication of the DC shutdown equipment using power line communication. This document defines how to propagate the operational state of the entire PV system (normal / shutdown) to the individual power production components comprising the PV system. The document also describes requirements and constraints associated with power line communication networks that are used to support this application. NOTE 1 It is possible to have systems communicating in different ways to the method covered in this document. E.g., in systems where all components of the PLC communication are from the same manufacturer. For those systems this document does not apply. NOTE 2 Not included in the scope of this document are requirements for DC shutdown initiator mechanism, disconnection and de-energization. NOTE 3 This document does not address whether DC shutdown is required or not. NOTE 4 EMC requirements are not included in this document.
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