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QNB-1 Quick Network Block
This Actisense Quick Network
Block (QNB-1) allows backbone networking connections to be made easy and
fault-free on National Marine Electronics Association (NMEA) buses and
networks.
The QNB-1 is two products in one, being compatible with both NMEA 0183
buses and NMEA 2000 networks:
- 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 presence of data on the
connected bus or network.
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