Furuno Single Junction Box NMEA 2000
The Furuno J-Box is an optional terminal box that is used when the cable from a wind transducer cannot fit through the mast to connect to the instrument. The J-Box is not waterproof, so locate it out of areas subject to rain or water splash
Example: Normally the Furuno FI-50 display unit is connected to the wind transducer with the cable assy. However, if the connector of the cable cannot be passed through the mast (because its diameter is too small), use the J-Box (000-010-913) to make the connection. The length of the cable between the Furuno wind transducer and display unit can be a maximum of 164 feet (50 meters).
NOTE: The J-Box is not waterproof, so locate it out of areas subject to rain or water splash.