This unit has become available after upgrading to NMEA2000. It is like new and 100%.
An expander lets you connect many devices to one output like a MUX or GPS output. It provides complete isolation and both single ended (RS-232) and double ended (RS-422) outputs.
10-30V DC powered.
New price $160.-
My price $99.-
available for cash pickup in Colon, Panama. The cost of sending this International is too high to make sense.