Dynon Avionics EMS-D120 Installation Guide - Manual (Page 19)

Transducer Installation
ALTERNATOR WIRE (JABIRU)
The most common tachometer pickoff location for Jabiru 2200 and 3300 engines is one of the
alternator wires. Splice a wire off one of the two white alternator wires, connect it through a 1-
amp fuse to the RPM Left input on the EMS-D120.
DIGITAL IGNITION AND OTHER PICKOFFS
The EMS-D120 can read frequency-based RPM signals, provided the peak voltage is at least 10
volts above ground. If the peak voltage exceeds 50 volts, use the included 30kΩ resistors as
described in the P-lead Pickoff section above. Like the other methods above, you must know the
number of pulses per revolution for your RPM transducer.
Manifold Pressure Sensor
EMS-D120 Installation Guide 3-5
The manifold pressure sensor is an integral
assembly consisting of three pins, a rubber
seal, and a connector housing. Strip 3/16”
insulation off the ends of the three wires listed
at right. Slide the three rubber seals onto the
three wires and the pins onto the ends of the
wires. Crimp the 3 provided pins onto the
ends of the wires, ensuring that the long tabs
that cradle the rubber seal wrap around the seal (see picture at
right for example). For more details on preparing and crimping
the Weather Pack pins, see
www.whiteproducts.net/faqs.shtml .
Pin
Weather
Pack Pin#
Color Function
Note that you will need access to the +5V excitation circuit for
other sensor installations, so make allowances for breaking out
the connection to other areas. Route the three wires to the
location where you would like to mount the manifold pressure
sensor.
Plug the crimped pins into the provided Weatherpack connector.
Now, mount the manifold pressure
sensor in a secure fashion using the
mounting holes on either side of the
pipe
t, including at the sensor itself.
sensor.
The pressure port on the manifold
pressure sensor requires 1/4” inner
diameter tubing for a secure fit. You
may need to use adapters to convert
down to smaller inner diameter tubing for your specific engine. We recommend that you use
clamps at every transition poin
18 C White/red
+5V
excitation
26 B Green/red
Manifold
pressure
17 A Black Ground
C B A
Figure 1 Connection diagram for
sensor with all black wires only
C B A
Figure 3: Pin insertion
(rear) view of supplied
connector.
Figure 2: Detail view of properly
crimped pin.