39
Appendix E
Interface formats are selected from the Setup ‘Interface’
on page 30 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 2.3 interface format is
supported by the eMap and enables the unit to drive up to
three NMEA devices.
NMEA 0183 Version 2.3 Approved Sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC,
GPRTE, GPWPL, GPBOD
GARMIN Proprietary Sentences:
PGRME (estimated error), 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.
An optional PC Interface Cable is also available to
connect your eMap to a PC-compatible computer’s serial
port.
Wiring/
Interfaces
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