RDAC X installation manual (800 KBytes) - MGL Avionics

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Connecting the rev counter REV counter wire from ignition system After you have connected the rev counter terminal to the signal source you need to set the number of pulses per 10 revolutions in the Calibration Menu. The calibration itself depends on your engine type and what kind of signal you are using. Typical sources are: Magneto coils (suitable signal at the kill Ballast resistor link switch). Primary (low voltage) side of ignition coil, at contact breaker or electronic ignition module. RPM counter output of electronic ignition systems (for example Bosh Motronic). RPM pickup devices such as hall-effect sensors on flywheels etc. Typical calibration settings are 10 or 20 for most engines. Other pulse counts per 10 revolutions are also possible for some engines. Note: The <strong>RDAC</strong> X EMS contains a 220 ohm ballast resistor that is in circuit if the indicated link is closed. Normally you would not need this. We have found a few Rotax engines that create a very noisy signal where you will need to use it. The problem manifests itself by several rev band regions giving unstable rev readings. Should you be unlucky enough to have one of these systems, please close the link with the supplied connector or solder the link closed.
The rev counter input on the <strong>RDAC</strong> can be used with signals from about 4Vpp to as much as 100Vpp. A noise filter is included that results in the input ignoring any noise signals as long as this is below the detection threshold of about 2.5Vpp. The input impedance of the rev counter input is approximately 10Kohm. You can use series resistors as well as load resistors for applications that have unusual signals.
Page 1 and 2: RDAC X Technical installation docum
Page 3 and 4: The RDAC X power supply and data ca
Page 5 and 6: Installation of the RDAC X The RDAC
Page 7 and 8: RDAC EMS unit thermocouple inputs T
Page 9 and 10: four strokes (such as the Rotax 912
Page 11 and 12: RDAC Fuel flow sender installation
Page 13 and 14: Example: Actual fuel used: 21.5 lit
Page 15 and 16: mechanical problems causing the flo
Page 17 and 18: Flow through the injectors may not
Page 19: You can connect capacitive senders
Page 23 and 24: Connecting the rev counter on a two
Page 25 and 26: The Rotax 912/914 contains two buil
Page 27: Connecting a Bendix magneto as RPM

RDAC X installation manual (800 KBytes) - MGL Avionics

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