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B921 AIS Class B

B921 AIS Class B
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B921 AIS Class B

Product catalog summary
Product Overview: The B921 is a Class B AIS transceiver designed for marine applications, offering a standard transmit power of 2W CSTDMA. It is compact, lightweight, and provides excellent AIS receive and transmit performance with minimal power consumption.
Key Features:
  • Global certification including USCG, FCC, Canada, and Europe.
  • Utilizes the SRT-AIS™ Transceiver Engine for superior performance.
  • FLEXI-FIT™ bracket system for easy installation.
  • Internal high-performance GPS receiver and antenna, with an option for an external antenna.
  • Waterproof and resistant to pressure spray and damp conditions (IPx6, IPx7 certified).
  • Protected against vibration, shock, and extreme temperatures.
  • Ultra-low power consumption.
  • Supports NMEA 0183 & NMEA 2000 interfaces.
  • Automated health and performance monitoring.
  • Silent mode (transmit-off) function.
  • Enhanced RF screening to prevent electromagnetic interference.
  • Built-in power surge protection.
Physical and Environmental Specifications:
  • Dimensions: 150 x 115 x 45mm
  • Weight: 375g
  • Operating temperature: -25°C to +55°C
  • Storage temperature: -25°C to +70°C
  • Ingress protection: IPx6 and IPx7
Electrical Specifications:
  • Supply voltage: 12V or 24V DC (range 9.6V - 31.2V DC)
  • Average current at 12V: 135mA
  • Peak current: 2A
  • Average power consumption at 12V: 1.6W
Data Interfaces:
  • NMEA 0183: 2 x bi-directional ports
  • NMEA 2000: Ed 3.101, LEN=1
  • USB: PC virtual com port for NMEA 0183 data
Standards Compliance:
  • AIS standards: IEC 62287-1 Ed. 3, ITU-R M.1371.5
  • Product safety standards: EN60950-1 2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013, EN62311:2008
  • Environmental standards: IEC 60945 Ed. 4
  • Serial data interface standards: IEC 61162-1 Ed 5.0, IEC 61162-2 Ed 1.0
  • GNSS performance standards: IEC 61108-1 Ed 2.0, IEC 61108-02 Ed 1.0
GNSS Specifications:
  • Supported systems: GPS, GLONASS, BeiDou, Galileo
  • Channels: 72
  • Time to first fix from cold start: 26s
VHF Transceiver Specifications:
  • VDL access scheme: CSTDMA
  • Operating frequency: 156.025MHz - 162.025MHz
  • Channel bandwidth: 25kHz
  • Receivers/transmitters: 2 x receivers, 1 x transmitter
  • AIS receiver sensitivity: -111dBm
  • AIS transmitter power: 2W (+33dBm)
User Interface:
  • Indicators for power, transmit timeout, error, and silent mode.
Package Contents:
  • 1 x AIS transceiver
  • 1 x Power and data cable (2M)
  • 1 x FLEXI-FIT™ mounting bracket with screws & optional fixing tape
Warranty: The product comes with a three-year global warranty. Returns are accepted within two days of receipt if the product is complete and undamaged. Contact Customer Support for issues.
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Catalog excerpts

B921 AIS Class B-1

STANDARD POWER (2W CSTDMA) The B921 is a standard transmit power I Certified AIS Class B – 2W CSTDMA (2W CSTDMA) Class B AIS transceiver that I Global certification - USCG / FCC / Canada / Europe is small and lightweight, yet delivers the very best I SRT-AIS™ Transceiver Engine for superlative proven performance AIS receive and transmit performance so you see more AIS information and targets at maximum range – all achieved with the lowest power consumption. With built-in intelligent connectivity, integrated next generation GPS receiver & antenna and a unique FLEXI-FIT bracket system, safe and secure ™ I FLEXI-FIT™ bracket system for easy, convenient and secure installation I Internal high-performance GPS receiver and antenna (external antenna optional) I ater, pressure spray and damp proof W (IPx6, IPx7 certified) I Protected from vibration, shock and extreme temperatures I Small and lightweight 2W TRANSMIT & RECEIVE I Ultra-low power consumption – best in class I NMEA 0183 & NMEA 2000 I Automated health and performance monitoring I Silent mode (transmit-off) function I Enhanced RF screening to protect against electromagnetic interference I Built-in power surge protection

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B921 AIS Class B-2

PHYSICAL & ENVIRONMENTAL SPECIFICATION Size (H x W x D) Operating temperature Storage temperature Ingress protection GNSS Systems supported GPS, GLONASS, BeiDou, Galileo (two of any combination, three including GPS, Galileo) Internal/external antenna Internal or optional external antenna Time to first fix from cold start ELECTRICAL SPECIFICATION Supply voltage Supply voltage range Peak current Average power consumption (at 12V) Galvanic isolation NMEA 0183 inputs only, NMEA 2000, VHF antenna port VHF TRANSCEIVER VDL access scheme Operating frequency Channel bandwidth USER INTERFACE Power, transmit...

 Open the catalog to page 2
B921 AIS Class B-3

INSTALLATION GUIDE GNSS antenna (Optional)

 Open the catalog to page 3

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