NMEA2000 is a CAN based communication protocol originated in the Marine market, similar to how RV-C protocol was developed in the RV market. Both protocols are based on underlying SAE J1939 automotive industry protocol, which defines PGN messages and 29 bit addressing scheme. Theoretically these 2 protocols can coexist on the same CAN backbone network, as they use the same 250kbs baud rate, but industry’s certification organizations like RVIA and NMEA do not officially allow mixing 2 protocols on the same network.
The best solution is to add a 2nd CAN interface, physically and electrically isolated from the main IonBus CAN interface and allow NMEA2000 messages only on this new CAN interface, so it can be connected to customer’s NMEA2000 backbone separately from Lithionics IonBus network.
NMEA2000 add-on board was developed, which can be installed inside the NeverDie V9 External BMS as an optional feature. Once installed, the BMS firmware automatically detects it and starts sending NMEA2000 messages to this CAN interface.
External connector is a standard M12 male 5pin used in NMEA2000 systems, which can be connected using standard off the shelf NMEA2000 drop cables.
See attached PDF for more details.
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