Concentrator installation The physical installation of the MBv master Elvaco CMe2100 is very simple connect the MBus to the terminals marked MBus master insert a SIM card connect the antenna to the SMA connector and place it in the place with the best signal - ideally outside of the rack connect 230V power supply to L a N terminals - standardly connected via 2A - (B), 10kA circuit breaker if the red LED is lit, either you have a short circuit on the bus or too many meters connected List of SMS …