Table 47 – Suggested Rotax 912 iS Sensor Connections for EMS D37F Harness
The Rotax 912 iS Electronic Control Unit (ECU) provides the following information to SkyView
via a computerized CAN bus interface:
Engine RPM (tachometer)
Oil Temperature
Oil Pressure
Coolant Temperature
Lane A Bus Voltage
Lane B Bus Voltage
EGT 1-4
Manifold Pressure
Fuel Flow
Engine Time
Throttle Position
Cold Start Assistance (color coding on the Throttle Position widget)
Power / ECO mode state
ROTAX: LIMIT FLIGHT OP is displayed as a CAUTION message in the SkyView display’s message
area concurrent with one of the two “EMS lamps” (discrete outputs) on the Rotax 912 iS ECU
are flashing.
ROTAX: LAND AIRCRAFT is displayed as a CAUTION message on the SkyView display’s message
area concurrent with both “EMS lamps” (discrete outputs) on the Rotax 912 iS ECU are flashing
simultaneously or on (any combination thereof), or any time one of the two lamps is on.
These two displayed messages are identical to Rotax’s published guidance to engine operators.
Note that installers can still connect ECU discrete outputs for each lamp to SkyView contact
inputs to display the actual lamps on a SkyView EMS page.
Additionally, the SV-EMS-221 provides an RPM out signal that can be sent to the aircraft's
propeller controller (if so equipped). The RPM out signal is nominally at 0 volts and steps to 12
volts for 0.1 milliseconds. The RPM out signal pulses once per engine revolution. The installer
must verify compatibility between the RPM out signal and the RPM input requirements of the
aircraft's propeller controller. The following diagram details all of the connections that need to
be made between the Rotax 912 iS and the SV-EMS-221, as well as the optional RPM signal
output to a propeller controller:
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