EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 201-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
E5.4 Electrical Installation
The Electrical installation of the EA100 will involve the following steps:
1)
Century only, build transformer TR1 or TR2 as per instructions in this appendix.
2)
Wire the main connections to the EA100 as shown in Figure E8.
3)
Wire the appropriate autopilot connections as shown in Figures E9 thru E22.
4)
KI254 installations only, the KI254 electric gyro used an attitude valid to the autopilot computer.
Remove this wire as open logic equals valid to the KC19X computer.
Perform an electrical load analysis to verify the aircraft complies with FAR 23.1351(a) using the current
draw of the EA100 from the table below. Refer to AC 43.13-1B paragraphs 11-35 and 11-36, page 11-
12 for additional information on Electrical Load determination and control.
Component
Current Draw (amps)
EA100 Adapter
0.25A @ 28Vdc
0.50A @ 14Vdc
Table E3: EA100 Current Draw
A two-ampere trip-free resettable (push-pull type) circuit breaker must be installed for the EA100 in a
location accessible to the pilot while seated. The power source for the EA100 is the same as that of the
autopilot computer. In most cases this is the avionics buss. The source could be the switched battery
buss through an autopilot on/off switch. The breaker must be labeled “A/P AHRS”. Record the location
of circuit breaker on Figure 3 of Aspen Avionics document #900-00012-001, Instructions for
Continued Airworthiness.
An “A/P AHRS FAIL” annunciator light must be installed in the pilot primary field-of-view. The light
must have the following specifications:
NOTE
The EFD1000 E5 does not display Flight Director information. The existing AI/FD indicator must
be retained and relocated to a position in the pilots field of view.
NOTE
If the existing gyro is supplying radar stabilization then these wires should be separated from
the autopilot wires and connected to the EA100 Aux output as the AP Output may not be
capable of driving both loads.
CAUTION
Radar Installations Only – the AUX EXCITE HI input is limited to 32Vp-p maximum voltage. Some
26V inverters are not well regulated and can exceed this voltage.