Regular price $677.39 $0.00

NMEA Buffer - 1 OPTO inputs, 6 ISO-Drive outputs, Serial Port, pluggable screw terminals

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Safely connect one Talker to six Listeners with full isolation.

The Type approved NMEA Buffer PRO-NBF-1 Buffer isolates and buffers NMEA 0183 data, with the power to drive multiple devices.

Able to 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.

Isolation on the input and outputs ensures the protection of the source Talker device and Listener devices.

The NMEA Buffer has ISO-Drive™ technology on the outputs and OPTO-isolation on the input which enables you to connect the NMEA 0183 Buffer with complete peace of mind.

The stainless steel housing makes the device rugged, sturdy and gives increased durability. The metal case also acts as an RF Shield making the device an ideal addition to commercial installations.

To make installation quick and simple the PRO-NBF-1 features 2-part pluggable connectors that allow use of screw terminals*, and a professional DIN Rail mounting system (DIN Rail not included). The device can also be mounted directly to the bulkhead.

The optional strain relief brackets can be provided to ensure reliable professional cable management.

Helpful LEDs indicate power, input, and output operation.


  • One Opto-Isolated Input
  • Six ISO-Drive™ outputs
  • Outputs automatically track the input baud rate
  • RS-232, RS-422 and RS-485 Listener compatible


  • ISO-Drive separates the Listener from the Talker to protect both the NBF-3 and each connected device
  • Wide compatibility meaning simplified installation
  • Simple installation saves time and money and provides peace of mind
  • Type Approved (RINA)
Power Supply
Input Supply Voltage9 to 35V DC
Input Supply Current150mA max @ 12V DC (all outputs @ full drive into 100Ω loads)
Input ProtectionContinuous reverse polarity and ESD protection
Power IndicatorLED, Blue – Indicates unit is functioning correctly
Input Supply ConnectorPluggable 2 way screw terminal, 5.08mm pitch
NMEA 0183 Port – Listener & Talkers
Number of Listener / Input PortsOne isolated NMEA 0183 Listener
Number of Talker / Output PortsSix isolated NMEA 0183 Talkers
CompatibilityFully NMEA 0183, RS422 & RS232 compatible. RS485 Listener compatible
Speed / baud rate4800 to 115200 bps
Talker Output Voltage drive>= 2.2V (differential) into 100Ω
Talker Output Current drive20mA max.
Talker Output ProtectionShort circuit and ESD
Talker Data IndicatorLED, Orange (Flashes at data rate)
Listener Input Voltage Tolerance-15V to +15V continuous, -35V to +35V short term (<1 second)
Listener Input ProtectionCurrent limited, overdrive protection to 40V DC and ESD protection
Listener Data IndicatorLED, green (Flashes to indicate valid input)
ConnectorsPluggable 2/3-way screw terminals, 5.08mm pitch
NMEA 0183 ListenerOPTO-Isolated, Hi-Pot tested to 1000V
NMEA 0183 TalkerUses IsoDriveTM, Hi-Pot tested to 1000V
Housing Material316 Stainless Steel
Dimensions139mm (L) x 128mm (W) x 27mm (H)
MountingBulkhead mount or DIN rail mount (DIN kit 1)
Approvals and Certifications
EMCEN 60945:2002 (Fourth Edition – 2002), DNVGL-CG-0339:2019
Compass safe distance600mm
Type Approval CertificateRINA
Operating Temperature-25 to +70°C
Storage Temperature-40 to +85°C
Maximum Relative Humidity (RH)95% @ 55°C
Environmental ProtectionIP40
Guarantee5 Years


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