• When used on an NMEA 0183 bus, the QNB-1 provides an easy junction box to connect multiple NMEA 0183 devices together. An NMEA talker device is connected to one of the network connection points, while each NMEA listener device is connected to the remaining connection points. No amplification or isolation buffering is included in the QNB-1 - if this is important, the NMEA Buffer (NBF-2) should be used instead.
• When used on an NMEA 2000 network, the QNB-1 is a multi-drop network backbone connection block, adhering to the barrier strip connection type detailed in the NMEA 2000 specification. This allows for 2 backbone connections (in & out), up to 6 drop connections and a power entry point.

The power entry connection is protected by two 4 Amp fuses, providing current protection to each half of the network backbone.

Useful LED indicators show power status, detect a power reversal, indicate whether the fuses are still intact, and detect the presense of data on the connected bus or network.