19FUEL 3100 / DIESEL 3200 Installation and Operation Manual NAVMANHowever, changing the backlight setting inan instrument in group 0 will not affect anyother instrument.To assign the FUEL 3100 or DIESEL 3200 toa group, set GrouP in the LAmP menu(see section 3-3).• If an alarm sounds, mute it by clearing thealarm on any instrument which can displaythat alarm.• NavBus junction boxes simplify wiring.For more information, refer to the NavBusInstallation and Operation Manual.NMEANMEA is an industry standard for marineinstrument connections. The FUEL 3100 andDIESEL 3200:• Can read speed data (RMC) from acompatible NMEA GPS instrument (seesection 3-6)• Transmit PTTKV, VHW, XDR, VLW .Several Navman instruments can be connectedtogether to share data, either by using NavBusor NMEA.NavBusNavBus is a Navman proprietary system that ishigh speed and allows a wide range of data tobe shared by the instruments.When instruments are connected by NavBus:• Data from a sensor connected to oneinstrument is available to all instruments.• If the units, alarms or calibration arechanged in one instrument, then the valueswill automatically change in all instrumentsof the same type.• Each instrument can be assigned to a groupof instruments by setting a group numberbetween 0 and 4. Then, if the backlightis changed in an instrument in groups 1,2, 3 or 4, it will automatically change inall the other instruments in that group.4-6 Systems of several instrumentsPower/data cablesJunction boxPower and dataconnectionsPower/data cablesNavBus cableGroup 1Group 2A typical NavBus systemPower and dataconnections