TruTrak EMS BU (8300-065) - Manual (Page 11)

TruTrak Flight Systems 9 EMS Installation Manual
JUNE 2009 8300-065 Rev D
EMS Software Updates
The EMS software can be updated by inserting a Compact Flash card (CF), with software acquired from
TruTrak Flight Systems. The CF card must be face down, in the top slot on the back. Then apply power
to the EMS, monitor the screen. Follow the instructions on the screen. When power is reapplied to the
EMS the new software version will be installed and displayed at the bottom of the screen.
SENSORS AND INPUTS
TruTrak Fight Systems can provide engine kits for all known engine types when an EMS / EDM order is
placed. The kit provides for all sensors / harnesses /pins needed.
All sensors ordered from TruTrak Flight Systems have a twisted, color coded, harness attached with
correct connections to the sensor. The EDM pin of the harness is not installed to provide easier routing of
the harness. Wires routed on the engine should be routed away from the exhaust system and above fuel
and hydraulic lines per standard aircraft wiring procedures, AC 43. See the installation manual from the
engine manufacture if possible. Engine wiring harnesses route better together where possible and should
be supported on the engine every 6 inches, Adel clamps work best for this, and tied together every 3
inches. All wire on the engine side of the firewall should be 22 gauge (bundle only) or larger with high
temperature insulation (Teflon) . Any connection from the engine to the firewall should have a service
loop to accommodate the movement of the engine.
TACH wires produce a lot of RF and should be shielded to reduce this as much as possible, only ground
one end. This is NOT the MAG wire, that uses the shield as part of the grounding system.
USE PIN OUT PAGES 18 & 19 FOR WIRING REFERENCES
Color codes:
RED------------------------12V (to EDM)
ORANGE-------------------5V (to EDM)
WHITE--------------SENSOR (to EDM)
BLACK------------ GROUND (to EDM)
Cylinder Head Temperature (J TYPE CHT) Probes (8250-036)
Lycoming / Continental engines use the bayonet J type CHT probes.
Rotax 912 engines use two resistive CHT probes that are included with the
engine. These probes are preinstalled, but you need to route the wire connections
(8220-019) from them to the EDM.
Oil Temperature Sensor
Lycoming / Continental engines must install the 399S9 resistive type. OT sensor
PN (8250-038). One black wire to ground (J2 pin 11, 12, 13) the other black wire
to J2 pin 18
Rotax 912 engines use one resistive OT probe that is included with the engine.
This probe is preinstalled, but you need to route the wire (8220-019)
connection to the EDM.