Originally Posted by Tim R.
Each end of your network must be terminated to work properly. I would doubt that Garmin or any other nmea2000 manufacturer would specify one if it was not needed.
Exactly how did you test it? Between pins on opposite ends or across pins on the same end?
I tested all 5 pins across opposite ends of the terminator. Unless the resistance is really, really low, (say around 0.1 ohms which is below the sensitivity of my digital multimeter), I'm pretty sure this piece does nothing. I don't have the equipment to check for capacitance, inductance, nor do I believe there are any fuses, internal chips, or circuitry inside this little piece of plastic
I suspect that the true network termination (whatever that really means) occurs at the sensor (GWS10). However, since the NMEA2000 specification states that all networks must be terminated, I suspect this device was generated simply to conform to that language of the specification.
I will set up the network here at home and test it both ways. Unless someone else knows better and chimes in.