Ais250 Integrated Nmea Multiplexer; Power - Raymarine AIS250 User Manual

Chapter 2: Installation

AIS250 integrated NMEA multiplexer

NMEA 38.4 NMEA 38.4 NMEA 4.8
OUT IN
The AIS250 has an internal multiplexer (baud rate converter)
allowing the integration of an additional NMEA 0183 device to
your multifunctional display.
Note: All NMEA ports operate NMEA 0183 interface standards,
operating at different baud rates. See NMEA 0183 tech-
nical specification for details.
Your AIS250 unit has 2 NMEA ports.
• 34.8 kbaud IN/OUT
• 4.8 kbaud IN/OUT
From left to right the ports are labelled as follows:
NMEA 38.4 OUT:
This port outputs received AIS data to your NMEA compatible
multifunction display*. This port will also multiplex and output
buffered data from the "NMEA 4.8 IN" port.
NMEA 38.4 IN:
This port allows NMEA sentences from your multifunctional
display such as GPS location, Autopilot route information i.e.
NMEA 4.8

POWER

OUT IN
Cross track error. This data is passed back to the AIS receiver to
be transmitted to a connected NMEA 0183 4.8 kbaud device
such as a DSC radio or Autopilot via the "NMEA 4.8 OUT" port.
Both 38.4 kbaud IN/OUT ports are connected to the single
NMEA 0183 port on either a C or E-series multifunctional display
with the connected NMEA port configured to 38400.
Important: The multifunctional display's NMEA baud rate must
be configured for "AIS 38400" for correct operation
see individual display's user manual for correct pro-
cedure. NB: Your multifunctional display may require
a software upgrade to enable this feature.
NMEA 4.8 OUT:
This port allows devices requiring NMEA 0183 data running at
4.8 kbaud as their input to integrate into the NMEA network.
Typically a DSC radio's or a 3rd party non-Raymarine Autopilot's
NMEA input would connect to this port.
NMEA 4.8 IN:
This port allows the integration of an external NMEA device such
as a fast heading sensor, NMEA GPS or other NMEA 0183
compatible device to communicate with the connected display
via 4.8 kbaud data which is multiplexed and sent via the 38.4
kbaud OUT port. If you have multiple NMEA 0183 4.8 kbaud
devices, the Raymarine NMEA multiplexer (p/n E55059) may be
used. The output from the multiplexer connects to this port.
Power
This port connects to your power supply to provide power to your
AIS250 receiver.
* it is important to note the received AIS data is ONLY output to
the 38.4 kbaud port and NOT to the 4.8 kbaud port.
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