SkyView System Installation Guide - Dynon Avionics

SV-EMS-220/221 Installation and Configurationcontact connects to a ground common to the SkyView system. The voltage on the generalpurpose inputs must not exceed 15 volts.General Purpose ThermocoupleYou may configure the SV-EMS-220 to monitor two J or K type thermocouples in addition to thetwelve thermocouples available on the SV-EMS-220’s D25. Note that the SV-EMS-221 usesthese four pins for Rotax 912 is communication, and, therefore, these pins are not available forthermocouple use on the SV-EMS-221. Dynon Avionics does not supply a specific generalpurpose thermocouple probe for this purpose. However, our standard EGT and CHT probes willwork, as will any other J or K type thermocouple.The following table revisits which SV-EMS-220 pins are compatible with general purposethermocouples.Pin Wire Color Function27 Not supplied General Purpose TC Input 1+28 Not supplied General Purpose TC Input 1-36 Blue General Purpose TC Input 2+37 Green General Purpose TC Input 2-Table 36–SV-EMS-220 D37 General Purpose Thermocouple PinsIf you use the second general purpose thermocouple input on pins 36 and 37, it isnecessary to remove the blue and green wires from these pins on the EMS 37-pinMain Sensor Harness.Dynon Avionics sells both J and K type thermocouple wire which may be used to connect thedesired thermocouple to the SkyView. Ensure you order the correct wire type for thethermocouple you intend to use. Crimp a female D-sub pin on the end of each wire, and plugthem into the SV-EMS-220’s EMS 37-pin Main Sensor Harness D37. Polarity is important, soensure that you are routing the positive side (yellow for K-type; white for J-type) of thethermocouple to pin 27 or pin 36 on the 37-pin harness, and the negative side to pin 28 or pin37.External EMS Warning LightSV-EMS-220/221 D37 pin 29 can be wired and configured as an External Alarm LightTo wire EMS D37 pin 29 as an External Alarm Light, you may connect any standard LED orincandescent lamp (1.5 watts maximum), used during EMS-related “red” warning alarmconditions. Ensure that the LED or lamp is designed for the voltage of your system. Mount it toyour panel according to its recommendations. Connect one of the lamp’s leads to your plane’sSkyView System Installation Guide - Revision O 7-51