The B921 is a 2W CSTDMA Class B AIS transceiver, delivering em-trak’s advanced performance and reliability through next-gen technology. Small and durable, this trusted transceiver processes all AIS transmissions in real-time, even at the range limit, so you always have the complete picture and the time to respond.

em-trak’s intelligent connectivity means the B921 can be connected to any chart-plotter and comes equipped with integrated GPS technology and best-in-class, ultra-low power consumption. Installation is also simplified with our unique FLEXI-FIT® bracket system to have you up and running in no time at all.

Features:

• Certified AIS Class B – 2W CSTDMA
• Global certification – USCG / FCC / Canada / Europe
• SRT-AIS™ Transceiver Engine for superlative proven performance
• FLEXI-FIT™ bracket system for easy, convenient, and secure installation
• Internal high-performance GPS receiver and antenna (external antenna optional)
• Water, pressure spray, and damp proof (IPx6, IPx7 certified)
• Protected from vibration, shock, and extreme temperatures
• Small and lightweight
• Ultra-low power consumption – best in class
• NMEA 0183 & NMEA 2000
• Automated health and performance monitoring
• Silent mode (transmit-off) function
• Enhanced RF screening to protect against electromagnetic interference
• Built-in power surge protection

Physical & Environmental Specifications:

• Size (H x W x D): 150 x 115 x 45mm
• Weight: 375kg
• 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
• Supply voltage range: 9.6V – 31.2V DC
• Average current (at 12V): 135mA
• Peak current: 2A
• Average power consumption (at 12V): 1.6W
• Galvanic isolation: NMEA 0183, NMEA 2000, VHF antenna port

Connectors:

• VHF antenna: SO-239
• GNSS: TNC
• Power: 12-way circular multipole
• NMEA 2000: 5-way Micro-C connector
• USB: USB Micro-B

Data Interfaces:

• NMEA 0183: 2 x bi-directional ports
• NMEA 2000: 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
• NMEA 2000: NMEA 2000 Ed 3.101
• GNSS performance standards: IEC 61108-1 Ed 2.0, IEC 61108-02 Ed 1.0

GNSS:

• Systems supported: GPS, GLONASS, BeiDou, Galileo (two of any combination, three including GPS, Galileo)
• Channels: 72
• Internal/external antenna: Internal or optional external antenna
• Time to first fix from the cold start: 26s

VHF Transceiver:

• VDL access scheme: CSTDMA
• Operating frequency: 156.025MHz – 162.025MHz
• Channel bandwidth: 25kHz
• Receivers/transmitters: 2 x receivers, 1 x transmitter
• AIS receiver sensitivity (20% PER): -111dBm
• AIS transmitter power: 2W (+33dBm)

User Interface:

Indicators: Power, transmit timeout, error, silent mode

In the Box:

• 1 x AIS transceiver
• 1 x Power and data cable (2M)
• 1 x FLEXI-FIT™ mounting bracket
• Complete with screws & optional fixing tape