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What is NMEA 2000?

NMEA 2000 is a plug and play

electronics communication

standard based on Controller Area

Network (CAN). The network carries

data sentences for commands as well as

messaging (tank levels) between NMEA

2000 devices.

What is a PGN?

All data transmitted on an

NMEA 2000 network are

organised into groups. These groups

are identified by a parameter group

number (PGN) that describes the type of

data contained in the group. The CZone

system can share certain monitoring

PGN’s with other NMEA 2000 compliant

devices, such as engine temps, pressures,

SOG, battery monitoring etc.

How many devices can

I have on the NMEA

2000 network?

No more than 50 NMEA 2000 devices

can be connected to any one NMEA

2000 network. It is also important that

there is no more than 3 V voltage drop

from the power source to the device

located farthest from the power source.

In case there are more than 50 devices

or the voltage drop exceeds 3 V, a CZone

Network Bridge Interface can be installed

to expand the network to a maximum of

252 devices.

How do I connect an

NMEA 2000 network?

The main communication

channel of the NMEA 2000 network

is the backbone to which your NMEA

2000 devices connect. Each NMEA 2000

device connects to the backbone with a

T-connector. The NMEA 2000 backbone

must be connected to 12 V DC power,

and terminators must be installed at both

ends of the network to function correctly.

Daisy chaining is not allowed.

What are the power

requirements on the

NMEA 2000 network?

Your NMEA 2000 network must be

connected to a 12 V DC power supply.

Do not connect the network to any other

voltage source, such as a 24 V DC power

supply. Supply power as close to the

middle of the backbone run as possible.

Do not connect the NMEA 2000 network

to power in more than one location

unless a CZone Network Bridge Interface

is used.

What cables should

I use?

We advise using the NMEA

2000 cables supplied by Mastervolt.

These NMEA 2000 Mini cables have a

greater current carrying capacity than

the standard Micro cables. This reduces

voltage drop on the longer backbone

runs expected on a CZone network.

What is the maximum

length for a drop cable?

The maximum length of a

single drop cable to a NMEA 2000 device

is 6 m (20 ft).

Can I connect other

devices to the CZone

NMEA 2000 network?

Yes, that is possible. CZone devices are

NMEA 2000 certified, so other NMEA

2000 compatible or certified devices can

connect and communicate together on

the same network.

What happens if a

CZone module is


All CZone modules offer a true ‘plug and

play’ installation. This means that, if a

CZone module is physically damaged and

needs replacing, you can just copy the

DIP switch setting to the new module and

plug it into the system. The system will

recognise the module by its DIP switch

setting and configure it automatically.

What happens if the

CZone network fails?

In the event the CZone

network fails, all loads that are controlled

through CZone can still be powered

by locating the (Combination) Output

Interface, and putting the hardware fuse

into the bypass position.

How do I configure the

CZone system?

The CZone system can be

easily configured from a Windows PC or

laptop connected to the network with the

CZone USB CAN Adapter.

Can CZone be connected

to MasterBus?

Yes, that is possible with a

CZone MasterBus Bridge Interface or

Wireless Interface.

Frequently asked questions

about CZone