1-7190-01150-02 Rev. J Garmin G500H Pilot’s GuideForewordSec 1SystemSec 2PFDSec 3MFDSec 4HazardAvoidanceSec 5AdditionalFeaturesSec 6Annun.& AlertsSec 7SymbolsSec 8Glossary Appendix AAppendix BIndex1.1.1.4 GMU 44The GMU 44 magnetometer senses the earth’s magnetic field. Data is sentto the GRS 77H AHRS for processing to determine aircraft magnetic heading.This unit receives power directly from the GRS 77H and communicates with theGRS 77H using a RS-485 digital interface.Figure 1-7 GMU 44 Magnetometer1.1.1.5 GTP 59The GTP 59 temperature probe provides Outside Air Temperature (OAT)data to the GDC 74H.Figure 1-8 GTP 59 Temperature Probe1.1.1.6 Garmin Navigator InterfaceThe G500H system requires connection to at least one external GarminWAAS GPS navigator, such as the 400W/500W series, GTN 600/700 series, orGNS 480.1.1.1.7 GEA 71The GEA 71 receives and processes signals from the engine and airframesensors.Figure 1-9 GEA 71
