NMEA 2000 bus crash

[george123]

Well we found the problem on the NMEA2000 network. When we checked the network with the power turned off we measured 54 ohms. So we began removing one at a time the devices. When we got to the WSO100 weather station the resistance jumped up to 60 ohms the correct value. When I measured the resistance between the two signal pins on the WSO100 on the bench it measured 500 ohms way to low, it should be in the meg ohms. I have returned the device to Maretron and they have determined that the network transceiver has failed. What was interesting the device was still sending out correct data on the network. So the take away from this you should always test the network resistance with the power turned off as one of the first thinks to do if you begin to have random fails over time.