Item Wire Function Wire ColorÀ NMEA 0183 internal port Rx (in) BrownÁ NMEA 0183 internal port Tx (out) Blue Ground (power and NMEA 0183) Blackà Power RedConnecting the Wiring Harness to Power1 Route the wiring harness to the power source and to thedevice.2 Connect the red wire to the positive (+) battery terminal, andconnect the black wire to the negative (-) battery terminal.NMEA 0183 Connection Considerations• The installation instructions provided with your NMEA 0183compatible device should contain the information you need toidentify the transmitting (Tx) and receiving (Rx) A (+) and B(-) wires.• When the device is mounted in a location that prevents theinternal antenna from acquiring a satellite signal, you canconnect an external GPS19x antenna through a NMEA 0183connection. For more information, see the GPS 19x NMEA0183 Installation Instructions.NMEA 0183 Connection Diagram+ -Item DescriptionÀ 12 Vdc power sourceÁ Wiring harness NMEA 0183 compliant deviceItem Garmin WireFunctionGarmin WireColorNMEA 0183 Device WireFunctionÊ Power Red PowerË Ground Black Data groundÌ Tx/Rx Tx/Rx/B (-)Í Tx Blue Rx/A (+)Î Rx Brown Tx/A (+)SpecificationsDevice Specification MeasurementechoMAP CHIRP70Dimensions (W x H xD)25 x 13.9 x 5.1 cm (9.8 x5.5 x 2 in.)Display size (W x H) 15.2 x 9.1 cm (6.0 x3.6 in.)Weight 0.77 kg (1.7 lbs.)Power input From 9 to 18 VdcMax. power usage 17 WCompass-safe distance 65 cm (25.6 in.)echoMAP CHIRP90Dimensions (W x H xD)28.8 x 16.3 x 5.1 cm (11.3x 6.4 x 2 in.)Display size (W x H) 19.8 x 11.2 cm (4.4 x7.8 in.)Weight 1 kg (2.3 lbs.)Power input From 9 to 18 VdcMax. power usage 20 WCompass-safe distance 65 cm (25.6 in.)All Models Temperature range From -15 to 55°C (from 5to 131°F)Material Polycarbonate plasticDevice Specification MeasurementWater rating* IEC 60529 IPX7Transmit power(RMS)**500 WMaximum depth*** 701 m (2,300 ft) at 77 kHzFrequencies**** • Traditional: 50, 77, 83,or 200 kHz• CHIRP DownVü: 260,455, or 800 kHz• CHIRP SideVü: 260,455, or 800 kHz*The device withstands incidental exposure to water of up to 1 mfor up to 30 min. For more information, go to www.garmin.com/waterrating.**Dependent upon transducer rating and depth.***Maximum depth, dependent upon transducer, water salinity,bottom type, and other water conditions.****Dependent upon echoMAP model.NMEA 2000 PGN InformationType PGN DescriptionTransmit and receive 059392 ISO acknowledgment059904 ISO request060928 ISO address claim126208 NMEA: Command, request, andacknowledge group function126996 Product information127250 Vessel heading128259 Speed: Water referenced128267 Water depth129539 GNSS DOPs129799 Radio frequency, mode, and power130306 Wind data130312 TemperatureTransmit 126464 Transmit and receive PGN list groupfunction127258 Magnetic Variance129025 Position: Rapid update129026 COG and SOG: Rapid update129029 GNSS position data129283 Cross track error129284 Navigation data129285 Navigation route and waypoint info129540 GNSS satellites in viewReceive 127245 Rudder127250 Vessel heading127488 Engine parameters: Rapid update127489 Engine parameters: Dynamic127493 Transmission parameters: Dynamic127498 Engine parameters: Static127505 Fluid level129038 AIS class A position report129039 AIS class B position report129040 AIS class B extended position report129794 AIS class A static and voyage relateddata129798 AIS SAR aircraft position report129802 AIS safety-related broadcast message129808 DSC call information130310 Environmental parameters130311 Environmental parameters (obsolete)4