Dynon Avionics SkyView System Installation Guide - Manual (Page 359)

SkyView System Installation Guide - Revision S 22-1
22. Appendix C: Wiring and Electrical Connections
SkyView utilizes standardized network connectors and wire harnesses for
equipment-to-equipment connections as well as other connections. Installers
should rarely have to build custom wire harnesses. This appendix is included as a
reference for those rare times when custom wiring is required.
Improper wiring can result in permanent damage to your instrument and/or the
accompanying sensors.
Make all connections to your harness before plugging it into any of the
components of the system. Do not make connections while power is applied at
any point in the system.
Wire Gauge
Unless otherwise specified, 22 AWG wire is normally sufficient for the power supply and ground
lines, but we recommend that you consult a wire sizing chart to determine the size required for
the wire routing in your particular aircraft. Ensure that the power lines include a circuit breaker
or an appropriately sized fuse for the wire you select.
Smaller gauge wire is sufficient for lines that only carry data.
FAA Advisory Circular AC 43.13-1B is an excellent resource for wire sizing requirements as well
as other acceptable methods, techniques, and practices in aircraft inspection and repair.
Grounding
Many of the engine sensors require a connection to a ground on the SV-EMS-220/221. There
are many places on an aircraft where you could connect these sensors. However, the ideal
location to ground these sensors is to one of the SV-EMS-220/221 ground pins. Connecting the
sensor’s ground pin directly to the SV-EMS-220/221 minimizes any voltage difference between
sensor ground and SV-EMS-220/221 ground.
You can measure the voltage difference between grounds to check if the
connection has a minimal voltage drop. Set a multimeter to the DC voltages setting
and place one probe tip on one ground and place the other probe tip on the other.
Measurements close to 0 mV (within 5 mV) are, in most cases, acceptable.
Other grounding recommendations include:

Ensure that solid, thick electrical connections exist between engine and battery ground.

Do not paint over surfaces that are ground connection points.