Communication adaptor for a light trunking system

A light trunking system (11) for supplying power and data to a series of lighting devices (21), wherein the light trunking system (11) comprises:

• a profiled track (12) and electrical lines (14) extending along the profiled track (12) configured to provide AC voltage and arranged on at least one inner side surface of the profiled track;
• at least two communication adaptors, wherein each communication adaptor (1) comprises:
• a housing (2) configured to be inserted in the profiled track (12) of the light trunking system (11), the housing (2) comprising outer walls (1.1),
• electrical contacts (4) arranged to be exposed onto at least one of the outer walls (1.1), the electrical contacts (4) being configured to contact different electrical lines (14) arranged in the profiled track (12) to provide AC voltage,
• a Power Line Communication (PLC) interface (6) configured to receive and transmit narrowband PLC data on the different electrical lines in the profiled track providing AC voltage at different poles in a parallel manner, the narrowband PLC data being conveyed on one or more of the electrical lines (14),
• an additional interface (8) configured to receive and transmit non-PLC, IP protocol data, and
• a data converter (9) that is a PLC modem configured to convert i) narrowband PLC data from the Power Line Communication interface (6) into non-PLC, IP protocol data for the additional interface (8), and ii) non-PLC, IP protocol data from the additional interface (8) into narrowband PLC data for the Power Line Communication interface (6);
• wherein the light trunking system (11) further comprises mechanical switches (16), each mechanical switch (16) being arranged to selectively connect a respective communication adaptor (1) to different electrical lines (14).