Garmin NMEA 2000 Technische referentie - Pagina 9

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When the voltage-drop formula is applied to this example, the voltage drop is less than 1.67 Vdc. This NMEA

2000 network will function correctly when powered at the end:

Resistance

0.053

When the voltage-drop formula is applied to this example, the voltage drop is greater than 1.67 Vdc. This NMEA

2000 network will not function correctly when powered at the end. to function correctly, this NMEA 2000

network must be redesigned with the power connected to the center of the network.

Resistance

0.053

Backbone cable

Length = 10 m

Backbone cable

Length = 6 m

Distance

(2 + 10 + 6 + 4)

End-Powered NMEA 2000 Network Designed Incorrectly

Power cable

Length = 2 m

Drop cable

Length = 2 m

Drop cable

Length = 4 m

Drop cable

Length = 6 m

Backbone cable

Length = 10 m

Backbone cable

Length = 6 m

Distance

(2 + 10 + 6 + 6)

Load

(4 + 5 + 5)

Load

(4 + 5 + 7)

0.1

Voltage drop

0.1

1.63 Vdc

0.1

Voltage drop

0.1

2.04 Vdc