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B921
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 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.
Integrated high performance GPS receiver and antenna
Connects to any navigation display or chart plotter – NMEA 2000 & NMEA 0183
Rugged, small & lightweight
Water, damp and weather proof (IPx6 & IPx7)
Ultra low power consumption
Quick & easy installation
SPECIFICATION
PHYSICAL & ENVIRONMENTAL SPECIFICATION
Size (H x W x D) 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 SPECIFICATION
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 inputs only,
NMEA 2000, VHF antenna port
CONNECTORS
VHF antenna SO-239
GNSS TNC
Power/NMEA 0183/silent mode 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 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
WHAT'S IN THE BOX
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
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