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GPSmap 76CS
Appendix
Interface Wiring Diagram
Unit Power/Data Port View
Interface formats are selected from the Interface Setup on page 58 of
this manual. The input/output lines on your GPSmap 76CS 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 3.01 interface format is supported by the
GPSmap 76CS and enables the unit to drive up to three NMEA devices.
NMEA 0183 Version 3.01 Approved Sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC, GPRTE, GPVTG,
GPWPL, GPBOD
Garmin Proprietary Sentences:
PGRME (estimated error), PGRMM (datum string), 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 GPSmap 76CS. 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 USB Interface Cable provided with this
unit allows you to connect your GPSmap 76CS
to a PC-compatible computer’s USB port.
Optional Power/Data Serial Port Cable
with Bare Wire Leads
Power(+)
Data In
Data Out
Ground(-)
GPSmap 76CS Owner's Guide copy.indd 95
GPSmap 76CS Owner's Guide copy.indd 95
10/8/2004 8:29:50 AM
10/8/2004 8:29:50 AM
