SkyView - Dynon Avionics

SV-EMS-220 Installation and Configurationas possible to the spot where you tap into the P-lead. This minimizes the length of cablecarrying high voltage spikes. Six-cylinder Lycoming engines sometimes need more inlineresistance to prevent false readings by the SV-EMS-220.If, after setting the PULS/REV R and L values as described in the EngineInformation Section, you see higher than expected RPM or unstable values, youmay need to increase the series resistance to as high as 150 kΩ.Trigger Coil (Rotax)The Rotax 912 engines have a 5 th trigger coil for the purposes of electrically monitoring revcounts. This trigger coil outputs to a two-wire harness. Connect either of the two wires toground; connect the other to the standard RPM Left input on the SV-EMS-220.Alternator Wire (Jabiru)The most common tachometer pickoff location for Jabiru 2200 and 3300 engines is one of thealternator wires. Connect one of the two white alternator wires through a 1 amp fuse to thestandard RPM Left input on the SV-EMS-220.Digital Ignition and Other PickoffsThe SV-EMS-220’s standard RPM inputs can read frequency-based RPM signals, provided thepeak voltage is at least 10 volts above ground. If the peak voltage exceeds 50 volts, use theincluded 30 kΩ resistors as described in the P-lead pickoff (Lycoming and Continental) Sectionabove. Like the other methods above, you must know the number of pulses per revolution foryour RPM transducer.Low Voltage RPM InputsIf you have an RPM source that outputs frequency-based RPM signals that are smaller than 10volts above ground—such as Light Speed ignition outputs—use the low voltage RPM inputs.Manifold Pressure SensorThe manifold pressure sensor is anintegral assembly consisting of threepins, a rubber seal, and a connectorhousing. Strip 3/16” insulation off theends of the three wires listed at right.Slide the three rubber seals onto thethree wires and the pins onto the endsof the wires. Crimp the 3 included pinsonto the ends of the wires, ensuring thatthe long tabs that cradle the rubber seal wrapPinWeatherPack PinColorTable 32–Manifold Pressure Sensor PinsFunction18 C White/red+5 voltAuxiliary26 B Green/redManifoldpressure17 A Black Groundaround the seal (see picture at right for example). For more details on preparing and crimpingthe Weather Pack pins, see www.whiteproducts.net/faqs.shtml.7-28 SkyView System Installation Guide - Revision J