Garmin GPSMAP 178C Owners Manual - Page 106

Wiring and Interfacing, Approved sentences- GPBWC, GPRMC, GPGGA, GPGLL, GPBOD, GPRTE - gps transducer

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Appendix A Wiring and Interfacing You can download a copy of Garmin's proprietary communication protocol from the Help and Support section of our web site at www. garmin.com 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 96 Connecting the Power/Data Cable The power/data cable connects the GPSMAP 178/178C to 10-35 volt DC system and provides interface capabilities for connecting external devices. The color code in the diagram below indicates the appropriate harness connections. To Transducer Note: During a typical installation, only the Red and Black wires are used. The other wires do not have to be connected for normal operation of the unit. Replacement fuse: AGC/3AG - 2.0 Amp To Unit Pin 11 - Yellow (Alarm) Pin 15 - Red (DC Positive) Pin 18 - Black (Ground) Pin 17 - Blue (TX COM 1) (Cable View) Pin 14 - Green (TX COM 2) Pin 13 - White (RX COM 2) Pin 16 - Brown (RX COM 1) (red) + 10-35 VDC (black) - Ground (Power/Data) (blue) Port 1 Data OUT (brown) Port 1 Data IN (white) Port 2 Data IN (green) Port 2 Data OUT (yellow) Alarm Low Alarm Relay 100ma max coil current DC � Power Source RXD + Autopilot/ NMEA Device RXD - Beacon TX+ Receiver or DSC VHF RX+ Interfacing The following formats are supported for connection of external devices: Garmin proprietary Differential GPS (DGPS), NMEA 0183 version 3.01, RTCM SC-104 input (version 2.0). The following are the sentences for NMEA 0183, version 3.01 output: Approved sentences- GPBWC, GPRMC, GPGGA, GPGSA, GPGSV, GPGLL, GPBOD, GPRMB, GPRTE, GPVTG, GPWPL and GPXTE. Sonar- SBDDBT, SDDPT, SDMTW, and SDVHW Proprietary sentences- PGRME, PGRMZ, and PSLIB.

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º·
Appendix A
Wiring and Interfacing
Connecting the Power/Data Cable
The power/data cable connects the GPSMAP 178/178C to 10-35 volt DC system and provides
interface capabilities for connecting external devices. The color code in the diagram below indicates the
appropriate harness connections.
Interfacing
The following formats are supported for connection of external devices: Garmin proprietary Differen-
tial GPS (DGPS), NMEA 0183 version 3.01, RTCM SC-104 input (version 2.0).
The following are the sentences for NMEA 0183, version 3.01 output:
Approved sentences— GPBWC, GPRMC, GPGGA, GPGSA, GPGSV, GPGLL, GPBOD, GPRMB, GPRTE,
GPVTG, GPWPL and GPXTE. Sonar— SBDDBT, SDDPT, SDMTW, and SDVHW
Proprietary sentences—
PGRME, PGRMZ, and PSLIB.
(red) + 10-35 VDC
(black) - Ground (Power/Data)
(blue) Port 1 Data OUT
(brown) Port 1 Data IN
(white) Port 2 Data IN
(green) Port 2 Data OUT
(yellow) Alarm Low
To Transducer
To Unit
Beacon
Receiver or
DSC VHF
Autopilot/
NMEA Device
DC
�
Power Source
RXD +
RXD -
RX+
TX+
Alarm Relay
100ma max
coil current
Note: During a typical installation,
only the Red and Black wires are used.
The other wires do not have to be con-
nected for normal operation of the unit.
Replacement fuse: AGC/3AG - 2.0 Amp
(Cable View)
Pin 16 - Brown (RX COM 1)
Pin 17 - Blue (TX COM 1)
Pin 13 - White (RX COM 2)
Pin 14 - Green (TX COM 2)
Pin 11 - Yellow (Alarm)
Pin 15 - Red (DC Positive)
Pin 18 - Black (Ground)
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 propri-
etary communication protocol from the Help
and Support section of our web site at www.
garmin.com