What is MasterBus?
MasterBus is a protocol for
between the connected components
within an electric system. MasterBus
is also the standard for a plug & play
information system for (de)centralised
operation, service and monitoring.
MasterBus ensures you a simple, logical
and reliable energy system.
What can I do with
The MasterBus system is
incredibly flexible and can be designed
and extended to any size. Using several
handy interfaces, it is also possible to
connect all sorts of conventional products
to MasterBus. Via the MasterBus
USB interface, for example, you can
connect a PC or a laptop to the system.
Can I connect other
products to the
Yes, that is possible. Although MasterBus
is a Mastervolt-specific protocol, non
-Mastervolt products can still be
connected to the system. Equipment
with maritime standard NMEA 2000
connections can be easily connected via
the MasterBus NMEA 2000 Interface. In
addition, the MasterBus network can
be integrated within your own central
system by means of the MasterBus
Modbus Interface or the MasterBus
Is MasterBus an open
No, MasterBus is a closed
protocol. This allows Mastervolt to
guarantee that a MasterBus system
works safely and without interference,
with a uniform data supply and no
unwanted interruptions. Components
from other suppliers can be connected
via the communication interfaces
specially designed by Mastervolt. They
ensure a safe and pure transition to the
protocol and operate as a firewall against
data interference and voltage conflicts.
This ensures that the MasterBus network
is always safe and reliable.
What is the basis of
MasterBus hardware is based
on CANbus V2.0 technology. The software
communication protocol was designed by
Mastervolt to maximise the performance
of an electrical power system.
How many Mastervolt
products can I connect
to a MasterBus?
You can connect a maximum of 63
products within a MasterBus data
What is the maximum
250 m with less than 10
150 m with up to 25 connected
100 m with up to 50 connected
Or use a MasterBus Repeater.
should I use?
We advise using the green
Mastervolt cables, but MasterBus also
works with high quality UTP cables.
A Mastervolt DIY kit contains all you need
to make the cables for a complete system
of any desired length.
How do I connect a
The MasterBus data network
lifeline is the cable which runs as a chain
from component to component. Both
ends of the cable should be provided
with a MasterBus terminator. On each
MasterBus product are two equal
communication ports for connection.
By connecting a MasterBus cable to each
of the ports you add the product to the
chain. The terminators at both ends
of the cable ensure interference-free
operation, prevent reflection of data
signals and ensure high communication
Do components always
have to be connected
as a chain?
The MasterBus network requires that
all components together create a chain
with terminators at both ends. Circular
configurations or branch systems may
interrupt the data supply and power
supply, damaging the connected
What might be
the causes of a
One or both terminators are missing
on the outside components in the chain.
One of the cables is disconnected or
incorrectly connected: Check whether you
see an open communication port.
One of the plugs is not properly
connected to the cable.
Do I need an
supply for MasterBus
No. A number of the connected
components, such as the MasterShunt
and the Mass battery charger, can supply
the necessary MasterBus power. Other
components such as interfaces and
MasterView panels consume this power.
The MasterBus cable is simultaneously
responsible for data communication and
Can I connect different
batteries to the same
Yes. As all power supply sources within a
MasterBus circuit are galvanically isolated,
all connections are completely safe.
Frequently asked questions
More on the next page...