output. Maximum permitted current draw from these terminals is 0.5A. Under no
circumstances connect transceivers or lighting to these terminals.
Recommended backup battery types are 12V sealed lead acid with capacities ranging
from 1Ah to 2.5Ah.
In case of a dual panel installation, it is permissible to connect both panels to a single
backup battery.
Please note that inline fuses or over-current sensing interrupters must be installed as
shown. It is wise to install these in such as way that it is possible to replace fuses in flight
or reset a circuit breaker.
This image shows a photo of a typical, principle installation wiring. Note the use of ferrite
beads on ALL wires leaving the instrument. Four ferrite beads are included with each
instrument as standard. These ferrite beads are vital to eliminate any RF interfering signals
that may cause radio interference particularly on VHF radios.
Beads may or may not be required, this will depend highly on installation and routing of
wiring in the aircraft. As a rule, follow these guidelines:
•
Antenna cables must never be routed alongside other wiring.
•
Place antennas as far away from any digital instrumentation as possible.
•
Avoid ground loops which can act as powerful, short range transmitting aerials for
weak signals. Ensure that your aerial has a good and correct ground plane.
•
Never share power or ground cables between RF equipment and digital equipment.
Each requires their own routing of power to the battery.
Notes on the use of ferrite beads:
