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P/N: NBE100-01
Network Bus Extender

Maretron’s NBE100 (Network Bus Extender) allows you to extend the maximum node count, network trunk length and cumulative device’s drop lengths of any NMEA 2000® network. The NBE100 solves bus errors and other electrical issues caused by exceeding any of these limitations and makes design of large networks easier.

nmea-2000-logo-productsNMEA 2000® networks have a maximum of 50 nodes allowed on a single network, a maximum network trunk length of 200m and a maximum cumulative device’s drop lengths of 78m.

If you have a network that exceeds any of these specifications, you can simply extend the network trunk by inserting the NBE100, along with additional termination resistors and powertaps. This will split the network into multiple electrical segments, each of which can have up to 50 nodes, these segments allow increase of nodes on the logical network. The NBE100 will transparently route NMEA 2000® messages between the multiple network segments, making them work as a single logical NMEA 2000® network. Advanced priority-based message routing ensures that higher-priority messages are always prioritized over lower-priority messages, enabling predictable and reliable network operation.


  • Segments a single large NMEA 2000 network into two smaller electrical segments.
  • Allows you to exceed the 50 node limitation on a NMEA 2000 network.
  • Allows you to exceed the 200m trunk length limitation on a NMEA 2000 network.
  • Allows you to exceed the 78m cumulative drop length limitation on a NMEA 2000 networks.
  • Allows all NMEA 2000 devices to operate as if they were still on a single NMEA 2000 network.
  • Priority-based message routing ensures higher-priority messages get through the bus extender first.
  • Optically isolates network segments, increasing signal integrity and network reliability.


Part number Description
NBE100-01 NMEA 2000® Network Bus Extender


Standard Comment
NMEA 2000® Standard Level A
Maritime Navigation and Radiocommunication Equipment & Systems IEC 61162-3
Maritime Navigation and Radiocommunication Equipment & Systems IEC 60945
FCC and CE Mark Electromagnetic Compatibility

NMEA 2000® Parameter Group Numbers (PGNs)

Description PGN # PGN Name Default Rate
Response to Request PGNs 126464
PGN List (Transmit and Receive)
Product Information
Configuration Information
Protocol PGNs 059392
ISO Acknowledge
ISO Request
ISO Address Claim
ISO Address Command
NMEA Request/Command/Acknowledge
Maretron Proprietary PGNs 126720 Configuration N/A


Parameter Value Comment
Operating Voltage 9 to 16 Volts DC Voltage
Power Consumption (Maximum) <150mA  
Load Equivalence Number (LEN) 3 NMEA 2000® Spec. (1LEN = 50 mA)
Reverse Battery Protection Yes Indefinitely
Load Dump Protection Yes Energy Rated per SAE J1113


Parameter Value Comment
Size 3.11” x 3.46” x 1.38” (79mm x 88mm x 35mm) Including Flanges for Mounting
Weight 8 oz. (227 g)  


Parameter Value
IEC 60945 Classification Exposed
Degree of Protection IP67
Operating Temperature -25°C to 55°C
Storage Temperature -40°C to 70°C
Relative Humidity 93%RH @40° per IEC60945-8.2
Vibration 2-13.2Hz @ ±1mm, 13.2-100Hz @ 7m/s2 per IEC 60945-8.7
Rain and Spray 12.5mm Nozzle @ 100liters/min from 3m for 30min per IEC 60945-8.8
Solar Radiation Ultraviolet B, A, Visible, and Infrared per IEC 60945-8.10
Corrosion (Salt Mist) 4 times 7 days @ 40°C, 95%RH after 2 hour Salt Spray Per IEC 60945-8.12
Electromagnetic Emission Conducted and Radiated Emission per IEC60945-9
Electromagnetic Immunity Conducted, Radiated, Supply, and ESD per IEC 60945-10
Safety Precautions Dangerous Voltage, Electromagnetic Radio Frequency per IEC 60945-12


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Marinplus AB/Odelco AB
Missionsvägen 77
SE-167 33 BROMMA


+46 8 718 03 00


Marinplus AB has merged with Odelco AB, thereby becoming the first and only distributor that can offer a complete range of products and solutions for power supply, modern electrical systems, rescue and security systems.


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