DIN-4 rail format to facilitate installation inside an electrical equipment box, or they can be screwed directly onto the wall. The source cannot be connected directly to the bus, given the characteristics of the DUOX System, since the power and data go through the same wires. This requires the connection module. The Feeder Connections Module must be connected directly to the bus with the shortest possible cable distance. This module prevents the power supply from disturbing the operation of the rest of the signals that circulate through the system and it will also be the one that allows connecting more sources if the system requires it. Input voltage: 18 VDC.