NBF-3-BAS NMEA Buffer

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.

FEATURES

• Galvanic opto-isolation on the NMEA 0183 input
• ISO-Drive™ NMEA 0183 outputs provide galvanic isolation to prevent ground loops
• Compatible with all NMEA 0183 versions without requiring configuration
• NMEA 0183 outputs compatible with RS422, RS232 and RS485 type Listeners
• NMEA 0183 input compatible with RS422 and RS232 type Talkers
• DIN Rail mountable
• Pluggable screw terminals for quick and easy installation and diagnostics
• Power and input indicator LEDs
• Works automatically up to 115200 Baud
• Amplification of weak input signals
• Power feed for single cable installation to the NMEA Talker

Technical 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 100Ω 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
• Compatibility: 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 100Ω
• 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)
• Connectors: Pluggable 2-way screw terminals, 3.5mm pitch

Mechanical

• Housing Material: Polycarbonate
• Protective Lid Material: Polycarbonate
• Sealing Materials: Expanded silicone foam gasket closed cell polyurethane splash guard and ePTFE waterproof vent
• Dimensions: 127mm (L) x 106mm (W) x 48mm (H)
• Weight: 210g
• Mounting: 4 x 3.5mm lugs to allow panel mount with self-tapping screws (included), optional DIN rail mount available on request.

Approvals and Certifications

• EMC: IEC60945-9 (sections 9 &10)
• Environmental Protection: IP66
• Operating Temperature: -20°C to +70°C
• Storage Temperature: -40°C to +85°C
• Relative Humidity: 0 to 80% RH
• Guarantee: 3 Years

To download the files simply click on the desired files to select and then click the Download button at the bottom .

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nmea_0183_information_sheet_issue_4_1.pdf

nbf_3_rev_a_user_manual_issue_1_02.pdf

nbf_3_rev_a_datasheet_issue_1_02.pdf