Picking up where this thread left off back in June …
I am electronically intimidated (fear hooking up the wrong two wires will let the magic smoke out.) The new-to-us boat came with `98/`99 vintage electronics at the nav station (ancient GPS
and a radio
that did not have DSC). The PO also bought a Garmin
192C at some point that he used at the helm.
Here is what I have –
Newly installed SH 2150 AIS VHF
at the nav station with RAM at the wheel.
192C moved to the nav station (I had a GPS
chart plotter from the last boat that the Admiral liked and wanted at the helm.)
I want to connect the “itty bitty” wires on the Garmin
to the “itty bitty” wires on the 2150 so the radio
knows where we are for the DSC function. If the SH 2150 can also send data that allows AIS targets to display on the Garmin
, that would be an added plus.
Here is what I know –
The Garmin has two “com ports” that can be individually set to speak Garmin, NMEA, Sonar or nothing. Com 2 can also be set to speak RTCM In/NMEA Out in addition to the “languages” listed for Com 1. The Garmin speaks NMEA 0183 version 2.3 and RTCM SC-104. It appears that the Garmin talks at 4800 bd on both com ports.
RED – Unit Power
BLACK – Unit and Data Ground
BLUE – NMEA OUT (Com 1 TX)
BROWN – NMEA IN (Com 1 RX)
WHITE – RTCM or NMEA IN (Com 2 RX)
GREEN – NMEA OUT (Com 2 TX)
The SH 2150 wires:
GREEN – NMEA Ground
BLUE – NMEA GPS
GRAY – NMEA DSC Output (+)
BROWN – AIS DATA Output (+)
I’m guessing that I should connect the wires as follows:
SH2150 GREEN (NMEA Ground) to Garmin BLACK (unit & data ground)
SH2150 BLUE (NMEA GPS
Input) to Garmin BLUE (NMEA Out / Com 1 TX)
SH2150 GRAY (NMEA DSC Output) to Garmin BROWN (NMEA IN / Com 1 RX)
SH2150 BROWN (AIS DATA Output) to Garmin WHITE (RTCM/NMEA IN / Com 2 RX)
Configure the two Garmin com ports to speak NMEA IN / NMEA OUT at 4800 bd.
Configure the SH2150 to talk at 4800 (the manual says the SH2150 BROWN wire will always talk at 38400 bd even if the other channels are set to 4800 bd.
Does this look like it should work?