Garmin eTrex Camo Owner's Manual - Page 48
Appendix E, Wiring Diagram
UPC - 753759031138
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Appendices Appendix E Wiring Diagram Interface formats are selected from the SETUP Page. The input/output lines on your eTrex 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 eTrex and enables the unit to drive up to three NMEA devices. NMEA 0183 Version 3.0 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 3.0 format through the 'Data In' line. The Garmin GBR 21 and GBR 23 are the recommended beacon receivers for use with the eTrex. 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 eTrex may be hard-wired to a serial connector using the Data Cable (see the Garmin web site, www.garmin.com for ordering information). Refer to the wiring diagram and the eTrex unit data connection illustrated below. The optional PC Interface Cable allows you to connect your eTrex to a PC-compatible computer's serial port. eTrex Connector Ground (-) Data Out Data In Power (+) Ground (-) Data Out Data In Black White Green Data Cable 46