Concentrator wiring The wiring of the MBus master Elvaco CMe3100 is as follows: Connect the power supply to terminals L and N - standard via a 10A circuit breaker - type C characteristics. Connect the MBus to the terminals marked M-Bus master. Finally, connect a network cable with RJ45 Cat5e or later generation terminals to the port marked Ethernet - if properly connected to the network, the yellow LED marked LAN will light up and the red LED marked ERR will light up when the IP address of the …