FAA Approved Installation Manual for the EDM-960 system
Report No 909
Primary Engine Data Management System
Page 11 of 45 Rev C
Date 12-12-12
Routing the Wiring Harnesses
Five connectors are protruding from each of the two EDM-950 DAU’s, one for each engine. Connect the five wiring
harnesses to the rear of the 950 DAU mounted on the cold side of the firewall and run the cables through the
firewall into the engine compartment. Allow sufficient service loop to facilitate removal of the connectors for
servicing. These wiring harnesses are labeled as follows:
EDM-950
DAU
Harness PN
P1
790200
Oil temperature, Induction temperature, Carburetor temperature, Outside air
temperature, Turbine inlet temperature, Turbine inlet temperature 2, Engine ground.
P2
700700
700702
CHT, EGT 6 cylinder 10 feet
CHT, EGT 4 cylinder
10 feet
P3
790422
RPM, MAP, Oil pressure
P4
700708
Fuel flow transducers FX-201, GPS
P5
790723
Fuel pressure (VDO), amperes, Voltage, and fuel level.
RAD’s
790749
Category 5 jack and cable for EDM-960 External remote display
P6
790802
Part of fuel qty sensor interface. Connects with J6 and P5
P7
790811
FQ, interface to Fuel tank.
P8
790807
Power for DAU, GPS , Aux Light to display on cockpit display
P9/P10
174203
Connector Lft/Rt Data (field installed to P11)
P11
790808
Power DAU, Data for DAU
P12
790810
Optional—Aux Light interface cable to J12 on P8
Route the wires from the connectors through the firewall using fireproof rubber grommets and flame retarding
silicone. Use an existing hole if possible. All wires must be routed away from high temperature areas (exhaust
stacks, turbochargers, etc.). Secure probe and sensor leads to a convenient location on the engine approximately 8
to 12 inches from the probe or sensor, being sure there is sufficient slack to absorb engine torque. It is essential in
routing the probe wire that this wire not be allowed to touch metal parts of the air-frame or engine since abrasion
will destroy this high temperature wire. Secure wires along the route to the indicator. Secure wire using original
clamps, tape or tie wrap if possible.
EDM-960 Display Wiring Harness
EDM-930 Display
Harness PN
Description
LEFT/FRONT RAD
790749
Category 5 jack and cable for RAD Right engine
RIGHT/REAR RAD
790749
Category 5 jack and cable for RAD Left engine
P8
790807
26 pin D-Sub - GPS RS232, GND, Aux Tank Intfc.
LEFT/FRONT ENGINE
(P9)
790808
Canon Plug (Installer wired) - Power, RS232 MFD data
RIGHT/REAR ENGINE
(P10)
790808
Canon Plug (Installer wired) - Power, RS232 MFD data
CAUTION: Be sure any wiring does not obstruct the control movement under the instrument panel.
The probe wires must not be tied in with ignition, alternator or engine cabin heater ignition wires because of
potential interference with readings.
The temperature probe wiring harness is made of Chromel-Alumel alloy wires that must not be substituted or
extended with copper wire. The power and ground wire are normal copper. Temperature probe leads may be
spliced with additional Chromel-Alumel wire using copper butt splices.
