NBF-1 NMEA Buffer
The NBF-1 is no longer in production. Please see the current NBF-3 model.
The Actisense NMEA Buffer module is the best solution for buffering weak NMEA sources, allowing them to drive many NMEA inputs such as chart plotter's, radar's, and/or an on-board PC / Laptop.
The Actisense NMEA Buffer module is the best solution for buffering weak NMEA sources, allowing them to drive many NMEA inputs such as chart plotter's, radar's, and/or an on-board PC / Laptop.

The NBF-1 Buffer is required wherever an NMEA source cannot provide sufficient power to drive all the equipment that requires the NMEA data it supplies. It is also ideal for safely interfacing an onboard PC to all the NMEA equipment on board a vessel.

Designed for use with all NMEA output types (RS422, RS485 and RS232), this buffer produces an amplified copy on each of its outputs. The buffer's input is fully Opto-isolated to provide electrical spike protection to the driver source, and meets the requirements of the latest NMEA 0183 specifications.

Simple to use, high quality screw connectors that are angled to allow easy access, make wiring up the NMEA Buffer a joy.
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Technical Specification

Supply voltage 8 35 V
Supply current Supply voltage 12v (Min. load, Max. load) 6 70 mA
Supply voltage 24v (Min. load, Max. load) 4.8 40 mA
NMEA in
Input voltage tolerance Continuous operation -15 +15 V
Short Term Operation (<1 sec) -35 +35 V
Short Term Operation (<1 sec) -35 35 V
Differential input voltage Required level for data to be detected 1.8 - V
Intput current - 2 mA
Input to output protection Full Galvanic Opto-isolation protection - 2000 V
RS485/RS422 out NMEA 0183 version 2-3
Output current RS485/RS422 compatible 15 40 mA
Differential output voltage 50 ohm load 2 - V
RS232 out NMEA 0183 version 1-3 & PC serial
Output current 5 10 mA
Output voltage  3k ohm load +/-5 - V
General
Baud rate - 57600 bps
Ambient temperature -20 70 °C
NBF-1 NMEA Buffer
Where to buy
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Testimonial
"We have been working with Actisense for more than 9 years now. Our sales in terms of units raise to a 4 digit figure. As far as I can remember, we have returned just one NMEA Buffer back to the manufacturer under warranty. That says it all."
Alberto Olmos, Sales Director, Aage Hempel Crame
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