Lowrance 4800m 产品宣传册

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For example, if you have to extend the power cable to the power bus or 

battery, attach one end of the fuse holder directly to the power bus or 

battery. This will protect both the unit and the power cable in the event 

of a short. 
This unit has reverse polarity protection. No damage will occur if the 

power wires are reversed. However, the unit will not work until the 

wires are attached correctly. 

 

The network and any NMEA 2000 devices, including the GPS 
module,  will not operate unless the NMEA 2000 Power Cable is 

connected to power. The NMEA 2000 power cable must be connected 

to power even if your only NMEA 2000 device is the GPS module and it 
is connected to the display unit's Network socket. (However,  never 

connect multiple power sources to a NMEA 2000 network. 
The method in diagram B is also used when your display unit is con-
nected to a NMEA 2000 network that is already connected to power. 

(Never connect multiple power sources to a NMEA 2000 network.)