Connecting the power/data cable – Garmin GPS 120 User Manual

Page 60

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Connecting the power/data cable

The power/data cable connects the GPS 120

system to a 10-40 volt DC power source and pro

vides interface capabilities for connecting NMEA

devices and an external alarm (see below for

interface operation details). The diagram below

indicates the appropriate harness connections.

To connect the GPS 120 to a power source;

1. C onnect the R ED harness leadto O ie positive side of a 10-40 volt D C pow er source. M ake sure the

pow er lead has an in-line 1-am p fuse installed.

2. Connect the BLAC K harness lead to a ground strip or the negative side of a

10-40 volt D C pow er source.

To connect an external alarm, cotmect the ground side of the alarm device to the

YELLOW harness lead. (100 mA DC load max.) The following interface formats are supported
by the GPS 120 for driving three NMEA devices:

NMEA 0180, NMEA 0182,

NMEA 0183 version 1.5:

Approved sentences:

GPBWC, GPGLL, GPRMB, GPRMC,

GPNTE.GPVTG, GFWPL

Proprietary sentences;

PGRMM (map datum), PGRMZ

(altitude), PSLIB (beacon lec. control)

NMEA 0183 version 2.0;

Approved sentences:

GPGGA, GPGLL, GPGSA, GPGSV,

GPRMB, GPRMC, GPRTE, GPWPL

Proprietary sentences:

PGRME (estimated error), PGRMM (map

datura), PGRMZ (altitude), PSLIB (beacon

receiver control)