Appendix F: Wiring/Interfaces - Garmin eMap Owner's Manual

Interface formats are selected from the Setup
"Interface' on page 28 of this manual. The input/output
lines on your eMap unit are RS-232 compatible, allowing
easy interface to a wide range of external devices,
including PC' s , differential beacon receivers, marine
autopilots and /or a second GPS receiver.
The NMEA 0183 version 2.0 interface format is
supported by the eMap and enables the unit to drive up
to three NMEA devices.
NMEA 0183 Version 2.0 Approved Sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB,
GPRMC, GPRTE, GPWPL, GPBOD
GARMIN Proprietary Sentences:
PGRME (estimated error), PGRMM (map datum),
PGRMZ (altitude), PSLIB (beacon receiver control)
DGPS (Differential GPS) corrections are accepted in
RTCM SC-104 version 2.0 format through the 'Data In'
line. The GARMIN GBR 21 is the recommended beacon
receiver for use with the eMap. Other beacon receivers
with the correct RTCM format may be used, but may not
correctly display status or allow tuning control from the
GPS unit.
The eMap may be hard-wired to a serial connector
using the Data Cable (see Appendix A for ordering
information). Refer to the wiring diagram and the eMap
unit data connection illustrated below.
The optional Data Cable is provided to connect your
eMap to a PC-compatible computer' s serial port (PC
Interface Cable) .
Appendix F
Wiring/
Interfaces
35