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Actisense NBF-3 NMEA Buffer

Actisense NBF-3 NMEA Buffer

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Retail Price:C$349.00
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Part Number:NBF-3

The Actisense NBF-3 NMEA Buffer isolates and buffers NMEA 0183 data, with the power to drive multiple devices.

The NBF-3 can distribute up to six identical, amplified streams of data from one source. The NMEA signals are buffered to ensure that each Listener receives the data at the required voltage levels, providing consistent data quality.

The isolation on the input and each of the outputs ensures the protection of the source Talker device and all the Listening devices. The safe connections mean that a non-isolated device could be connected and the NBF-3 would prevent it from causing any damage to the other equipment in the system. Ground loops often occur when devices are not isolated and can cause irreparable damage. Actisense ISO-Drive technology on the outputs along with the galvanic opto-isolation on the input means you can connect the NBF-3 with complete peace of mind.    

The NBF-3 has the addition of power distribution for the NMEA Talker. By having power and data from the same source, cabling requirements are reduced and installation is simple.


* Galvanic opto-isolation on imput
* ISO-Drive outputs provide galvanic isolation
*Compatible with all NMEA 0183 versions
* Outputs compatible with RS422, RS232 and RS485 type Listeners
* Input compatible with RS422 and RS232 type Talkers
*Pluggable screw terminals for quick and easy installation
* Power and input indicator LEDs
*Power feed for single cable installation to the NMEA Talker
*Din Rail mountable
* Works up to 115200 Baud

Actisense NBF-3 Specifications

Power Supply

Input Supply Voltage

10 to 35V DC 

Input Supply Current (NBF-3 only)

100mA max @ 12V DC (all outputs @ full drive into 100O loads)

Input Supply Connector

Pluggable 2 way screw terminal, 3.5mm pitch

Input Protection (NBF-3)

Continuous reverse polarity and ESD protection

Power Indicator

LED, blue (lit constantly indicates correct operation when input supply is connected)

Listener Power Output Voltage

10 to 35V DC derived directly from the input supply voltage

Listener Power Output Current

500mA max @ <=30°C (See Note)* (PTC self-resettable fuse)

Listener Power Output Connector

 Pluggable 2 way screw terminal, 3.5mm pitch



NMEA 0183 Port - Listener & Talker

Number of Listener/Input Ports

One isolated NMEA 0183 Listener 

Number of Talker/Output Ports 

Six isolated NMEA 0183 Talkers


Fully NMEA 0183, RS422 & RS232 compatible. RS485 Listener compatible

Galvanic Isolation

2500V input to ground 1500V output to ground using ISO-Drive

Speed/Baud Rate

4800 to 115200 bps

Talker Output Voltage Drive

>=2.1V (differential) into 100O

Talker Output Current Drive

20mA max

Talker Output Protection

Short circuit and ESD 

Listener Input Voltage Tolerance

 -15V to +15V continuous, -35V to +35V short term (<1 second) 

Listener Input Protection

Current limited, overdrive protection to 40V DC and ESD protection

Listener Data Indicator 

LED, green (flashes at data rate)


Pluggable 2-way screw terminals, 3.5mm pitch




 Housing Material


 Protective Lid Material


 Sealing Materials

Expanded silicone foam gasket closed cell polyurethane splash guard and ePTFE waterproof vent


127mm (L) x 106mm (W) x 48mm (H) 




 4 x 3.5mm lugs to allow panel mount with self tapping screws (included), optional DIN rail mount available on request.



Approvals and Certifications


IEC60945-9 (sections 9 &10)

Environmental Protection


Operating Temperature

-20°C to +70°C

Storage Temperature

-40°C to +85°C

Relative Humidity

0 to 80% RH


3 Years 

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