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APPENDIX B
Specifications &
Wiring
DATA IN
(WHITE)
POWER
(RED)
GROUND
(BLACK)
DATA OUT
(BROWN)
Three optional cables are available to connect the GPS 12 to an external power
source or interface with another unit or PC:
• Cigarette Lighter Adapter— Allows connection to a 12-volt DC cigarette
lighter plug. Part No. 010-10084-00.
• Data Transfer Cable— Allows data transfer between GARMIN GPS units. The
GPS 12 is compatible with the following units: GPS 38/40/45/45XL, GPS II/II
plus, GPS12, and GPS 12XL. Information that can be transferred includes the
almanac, waypoints, routes, and tracklog. However, waypoint symbols are
only transferrable from or to units that support waypoint symbols such as the
GPS II plus, GPS12, and GPS 12XL software version 3.01 or later. Part No.
010-10142-00.
• PC Kit Interface Cable— PC interface cable with 9-pin ‘D’ serial data connec-
tor. Part No. 010-10141-00. (A combined Cigarette Lighter Adapter and PC
Interface Cable is also available as Part No. 010-10164-00.)
The following interface formats are supported by the GPS 12 for connection to
up to three NMEA devices:
unit view
NMEA 0180
NMEA 0182
NMEA 0183 version 1.5
Approved sentences:
GPRMB, GPRMC, GPWPL
Proprietary sentences:
PGRMM (map datum),
PGRMZ (altitude), PSLIB
(beacon rec. control)
NMEA 0183 version 2.0
Approved sentences:
GPGGA, GPGSA, GPGSV,
GPRMB, GPRMC, GPRTE,
GPWPL
Proprietary sentences:
PGRME(estimated error),
PGRMM (map datum), PSLIB
(beacon receiver control)
DGPScorrections are accepted on
RTCM-104 v. 2.1 format.
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GPS12B 1/13/99 5:02 PM Page 53