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81
Appendix G
Wiring and
Interfacing
Connecting the Power/Data
The power/data cable connects the GPS 182/232 to a 8-35 volt DC system and provides interface
capabilities for connecting external devices. The color code in the diagram below indicates the
appropriate harness connections. Replacement fuse is a AGC/3AG - 1.5 Amp fuse.
Interfacing
The following formats are supported for connection of external devices: GARMIN proprietary
Differential GPS (DGPS), NMEA 0183 version 2.3, RTCM SC-104 input (version 2.0).
The following are the sentences for NMEA 0183, version 2.3 output:
Approved sentences— GPBWC, GPRMC, GPGGA, GPGSA, GPGSV, GPGLL, GPBOD, GPRMB, GPRTE,
GPVTG, GPWPL and GPXTE. Proprietary sentences— PGRME, PGRMZ, and PSLIB.
The GPS 182/232 also includes NMEA input with support for the WPL sentence and sonar NMEA
input with support for the DPT (Depth), MTW (Water Temp) and VHW (Water Speed & Heading)
sentences. If connecting to COM2 for sonar NMEA input, the unit interface must be set to NMEA
In/NMEA Out (see page 65). If connecting to COM1, the unit must be set to NMEA In/NMEA Out.
1
2
3
4
5
6
7
PIN 1 (red) 8-35 VDC
PIN 2 (black) Ground (Power and Data)
PIN 3 (blue) NMEA OUT (Com 1 TX)
PIN 4 (brown) NMEA IN (Com 1 RX)
PIN 5 (white) RTCM/NMEA IN (Com 2
PIN 6 (green) NMEA OUT (Com 2 TX)
PIN 7 (yellow) Alarm Low
NMEA
Device with
Sonar Output
TXD +
Alarm Relay
100ma max
coil current
GBR 23
Beacon
Receiver
Autopilot/
NMEA Device
8-35 volts DC
RXD +
RXD -
Brown
Blue
Complete information concerning
NMEA & RTCM formats and
sentences is available for purchase
from NMEA at:
NMEA
Seven Riggs Avenue
Severna Park, MD 21146
U.S.A.
410-975-9425
410-975-9450 FAX
www.nmea.org
Radio Technical Commission For
Maritime Services (RTCM)
1800 Diagonal Road, Suite 600
Alexandria, VA 22314-2480
U.S.A.
703-684-4481 (Info Only)
703-836-4229 FAX
www.rtcm.org
You can download a copy of GARMIN's
proprietary communication protocol the Help
and Support section of our web site at
www.garmin.com.
182_232 Manual Part 2.indd 12/21/01, 11:42 AM81