SYSTEM INSTALLATION MANUAL
89000016
(2)
In a certified installation, MIL-W-16878E/4 or equivalent wire must be used. Wire gauge must
be AWG 24 for all wires. Shielded, twisted wiring is recommended for the TMAP pair (and all
serial data communication pairs) to improve electromagnetic emissions and susceptibility;
one twist for each 1 to 2 inches (25.4 to 50.8 mm) is adequate. Other pairs in the bundle
can also be twisted but are not required.
(3)
The distance between the KGX and the KGX control panel is limited by the impedance of the
wire between them. The KGX control panel is powered by the KGX, not from aircraft power,
and therefore the acceptable voltage drop in the power line limits the wire length. The KGX
control panel needs an impedance of less than 1.0 ohm in the power line for satisfactory
operation. The following table gives guidelines for typical aircraft hook-up wire.
NOTE:
Different brands can vary. Check your supplier for details.
(4)
Refer to Table 2006 for the wiring considerations.
Table 2006. Wiring Considerations
Gauge
Milliohm/Foot
Length for 0.5 Ohm
AWG 24
30.2
33.2 feet (10.12 m)
(5)
An alternative to a harness built from individual wires, particularly for a long cable run, is to
use a multi-core cable. Aviation grade cable with six or more cores is often more expensive
than the individual wires.
NOTE:
Not all data cable is suitable for this application. Cables with solid cores must not
be used, and cables must be selected based on the wear characteristics of their
insulation material, including temperature rating, resistance to solvents and oils,
and flammability. Most inexpensive commercial data cables have poor flammability
properties.
EFFECTIVITY
ALL
Page 2023
22 Dec 2016
© Honeywell International Inc. Do not copy without express permission of Honeywell.