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PLCBUS (Communication Protocol) or PLC-BUS is a power-line communication protocol for communication between electronic devices used for home automation. It primarily uses power line wiring for signaling and control.

PLCBUS is similar to the X10 (industry standard) power line communication protocol. Though PLCBUS uses the same addressing scheme it is not compatible with X10. PLCBUS and X10 can coexist in the same power-line network and can interact with the use of bridges (like the PLCBUS 4808 device).