I'm integrating quite a large system on a boat, using multiple manufacturers HW and need to get the Victron data across 2 x CAN networks, one a standard J1939 and the other a NMEA network.
As the CANBUS ports on the Cerbo are not isolated I think I have an issue, but think it can be resolved.
My Victron CANBUS will be made up of, in sequence:
Victron VE CAN to NMEA2k adapter cable in port one of Starboard MPPT
CANBUS in port two of Starboard MPPT
CANBUS in port one of Port MPPT
CANBUS in port two of Port MPPT
CANBUS in port one of Cerbo
CANBUS in port two of Cerbo, which will connect to the J1939 network which has an Orion BMS on it, this is quite detailed in a Victron paper For this CANBUS network, the Orion BMS has a terminator and I will add a 120 Ohm resistor to complete termination requirements. This network will also have 12v power.
Does the above sound correct?
My issue is; will I have power going into 2 places on the network, one through the CANBUS port 1 on the Staboard MPPT where the VE CAN/NMEA 2k cable connects and the second through the port 2 of the Cerbo, which is connecteed to the powered J1939 network? If so, I assume I should use a bridge between the NMEA2k network and the VE CAN network?
Any other issues I may have missed with my approach?