NMEA 2000 STUDY GUIDE WITH
COMPLETE SOLUTION
When termination resistors are connected at the wrong locations, the voltage
drop in the power leads (NET-S and NET-C) will be ______________ than the
common mode voltage range. - ANSWER Voltage drop is unaffected by
termination resistors.
True or False... NMEA 2000® PGN's are a series of numbers and letters that
describe the data coming from a particular device on the network. - ANSWER
False.
Which of the statements regarding Bus Power for a NMEA 2000 Backbone is
False?
Calculations ensure that all devices are getting adequate power.
More than one Power Tee(s) may be needed to feed all devices
Devices furtherest from power insertion point will get less voltage. -
ANSWER None of the above.
In-Line Termination Resistors are typically used when: - ANSWER There are
cable runs greater than 6 meters up a mast or tower.
Which installation example would require device instancing? - ANSWER 2
Transducers.
The maximum voltage drop allowed from the battery source to the power
insertion point is: - ANSWER 3%.
, The NMEA 2000 Mid cable can use which of the following connectors?
Field Attachable
Mini
Micro
All of the above. - ANSWER All of the above.
True or false? If you are using multiple power Tees, the Shield / Drain
connection should be connected to the non-current carrying RF Ground
system at only one location. - ANSWER True.
The purpose of termination resistors in an NMEA 2000® backbone is: -
ANSWER To limit signal reflections from each end of the backbone.
True or false? If a display on the network has a LEN of 22, it can power itself
entirely from the NMEA 2000 network power. - ANSWER False.
True or false? In order to get a 60 Ohm meter reading between the blue and
white NMEA 2000 data wires, power to the network must be OFF. - ANSWER
True.
A NMEA 2000® backbone Tee has two connectors on the backbone: _______
and _______, and a third _______ connector for the drop. - ANSWER Male and
Female, Female
True or false? The shield / drain wire is connected to the NMEA 2000®
network common reference ground at only one power supply location. -
ANSWER True.
The maximum network voltage drop for an NMEA 2000® network powered
from a regulated DC Power Supply is: - ANSWER 3.61 volts.
COMPLETE SOLUTION
When termination resistors are connected at the wrong locations, the voltage
drop in the power leads (NET-S and NET-C) will be ______________ than the
common mode voltage range. - ANSWER Voltage drop is unaffected by
termination resistors.
True or False... NMEA 2000® PGN's are a series of numbers and letters that
describe the data coming from a particular device on the network. - ANSWER
False.
Which of the statements regarding Bus Power for a NMEA 2000 Backbone is
False?
Calculations ensure that all devices are getting adequate power.
More than one Power Tee(s) may be needed to feed all devices
Devices furtherest from power insertion point will get less voltage. -
ANSWER None of the above.
In-Line Termination Resistors are typically used when: - ANSWER There are
cable runs greater than 6 meters up a mast or tower.
Which installation example would require device instancing? - ANSWER 2
Transducers.
The maximum voltage drop allowed from the battery source to the power
insertion point is: - ANSWER 3%.
, The NMEA 2000 Mid cable can use which of the following connectors?
Field Attachable
Mini
Micro
All of the above. - ANSWER All of the above.
True or false? If you are using multiple power Tees, the Shield / Drain
connection should be connected to the non-current carrying RF Ground
system at only one location. - ANSWER True.
The purpose of termination resistors in an NMEA 2000® backbone is: -
ANSWER To limit signal reflections from each end of the backbone.
True or false? If a display on the network has a LEN of 22, it can power itself
entirely from the NMEA 2000 network power. - ANSWER False.
True or false? In order to get a 60 Ohm meter reading between the blue and
white NMEA 2000 data wires, power to the network must be OFF. - ANSWER
True.
A NMEA 2000® backbone Tee has two connectors on the backbone: _______
and _______, and a third _______ connector for the drop. - ANSWER Male and
Female, Female
True or false? The shield / drain wire is connected to the NMEA 2000®
network common reference ground at only one power supply location. -
ANSWER True.
The maximum network voltage drop for an NMEA 2000® network powered
from a regulated DC Power Supply is: - ANSWER 3.61 volts.
