Item Wire Function Wire Color 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.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 Blue Rx/A (+)Í Rx Brown Tx/A (+)Updating the Device SoftwareBefore you can update the software, you must obtain asoftware-update memory card or load the latest software onto amemory card.1 Turn on the chartplotter.2 After the home screen appears, insert the memory card intothe card slot.NOTE: In order for the software update instructions toappear, the device must be fully booted before the card isinserted.3 Follow the on-screen instructions.4 Wait several minutes while the software update processcompletes.The device returns to normal operation after the softwareupdate process is complete.5 Remove the memory card.NOTE: If the memory card is removed before the devicerestarts fully, the software update is not complete.SpecificationsDevice Specification MeasurementechoMAP 40 Dimensions (W x H x D) 10.2 x 16.8 x 4.6 cm (4 x 6.6 x1.8 in.)Display size (W x H) 5.4 x 9.5 cm (2.1 x 3.7 in.)Weight 0.4 kg (0.9 lbs.)Power input From 10 to 18 VdcMax. power usage 5 WCompass-safe distance 20 cm (8 in.)Device Specification MeasurementechoMAP 50 Dimensions (W x H x D) 17.3 x 13.5 x 4.4 cm (6.81 x5.35 x 1.73 in.)Display size (W x H) 9 x 9 cm (3.54 x 3.54 in.)Weight 0.58 kg (1.28 lbs.)Power input From 10 to 20 VdcMax. power usage 7.1 WCompass-safe distance 75 cm (29.5 in.)All Models Temperature range From -15 to 55°C (from 5 to131°F)Material Polycarbonate plasticWater rating IEC 60529 IPX7Transmit power (RMS)** 500 WMaximum depth*** 701 m (2300 ft) at 77 kHzFrequencies**** • Traditional: 50,77, or200 kHz• DownVü: 260 or 455 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 0183 InformationType Sentence DescriptionTransmit GPAPB APB: Heading or track controller(autopilot) sentence "B"GPBOD BOD: Bearing (origin todestination)GPBWC BWC: Bearing and distance towaypointGPGGA GGA: Global positioning systemfix dataGPGLL GLL: Geographic position(latitude and longitude)GPGSA GSA: GNSS DOP and activesatellitesGPGSV GSV: GNSS satellites in viewGPRMB RMB: Recommended minimumnavigation informationGPRMC RMC: Recommended minimumspecific GNSS dataGPRTE RTE: RoutesGPVTG VTG: Course over ground andground speedGPWPL WPL: Waypoint locationGPXTE XTE: Cross track errorPGRME E: Estimated errorPGRMM M: Map datumPGRMZ Z: AltitudeSDDBT DBT: Depth below transducerSDDPT DPT: DepthSDMTW MTW: Water temperatureSDVHW VHW: Water speed and headingReceive DPT DepthDBT Depth below transducerMTW Water temperatureRMC/GGA/GLL GPS positionVHW Water speed and headingWPL Waypoint location4 echoMAP 40/50 Series Installation Instructions