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two ports are NOT standard POE (Power over Ethernet) and POE devices cannot be
connected to these two ports.
2.6.2. Power Synchronization
A NN3D network is a system in which all components share information (navigation
data, settings, points, routes, etc) with each other. Furuno developed special Power
Synchronization features to allow proper network synchronization and functionality.
Sleep Mode:
The MFDs have a special “sleep mode” that allows each MFD to process data while
consuming low power. NN3D MFDs can be in 3 states:
- ON: This is the regular mode of operation. The screen is ON and the user can interact
with the device. The unit can process and share information on the network.
- OFF: The MFD is completely OFF and doesn’t process information. No power is
consumed in this state.
- Sleep Mode: The screen is off and no user interaction is possible (except turning the
unit ON with the Power Key). Even though the MFD appears off and the LCD is black, it
will still process and share information with other MFDs on the network. The MFD
consumes lower current in this state. Any NMEA2000/0183 and DRS sensors attached
to the MFD ports will still function normally when an MFD is in Sleep Mode.
NN3D Sleep Mode Functional Description:
When the first networked MFD is powered
ON (using the power key), all the other networked MFD(s) automatically start in sleep
mode (power synchronization). Pressing the Power key of an MFD in sleep mode will
turn it ON. Pressing the power key of a networked MFD that is turned ON will put it back
in Sleep Mode. Using the Power key on the last MFD turned “ON” on the network (all
the others are already in Sleep mode) will turn the system (all MFDs) completely OFF.
IMPORTANT: Sleep Mode functionality requires the use of Furuno proprietary Hubs.
The Internal MFDBB Hub and the optional Furuno HUB101 both provide NN3D Sleep
Mode functionality. Use of other generic Ethernet Hubs/Switches, while allowed,
will not enable NN3D Sleep Mode! Caution must also be used in that only “Two Pair”
Ethernet cables may be utilized with generic hubs/switches so that the Sleep Mode
signals are not short circuited by “Four Pair” Ethernet cables. Note also that enabling
the Power Synchronization function in Navnet 3D is also very important for proper Data
Syncrhonization and system integrity! Please refer to next paragraph for more
information.