EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001 PAGE 90-226 REVISION D
© Copyright 2019 Aspen Avionics Inc.
8.2.4.8 APPR Active Input
Active low discrete input from a GPS receiver when approach mode is activated.
8.2.4.9 FCS-LOC Engage Input
Active low discrete input from a GPS receiver when approach is selected.
8.2.5 Autopilot
8.2.5.1 Lateral Deviation Output
A low-level lateral deviation output that is connected to an autopilot lateral deviation
(RT/LT) input. The low side of the differential output is referenced to ground. Before
connecting this output verify the receiving equipment’s left/right input can
accommodate a ground potential on the low side.
Lateral Deviation: .......... ±150mVdc minimum for full scale CDI deflection
Sense: ........................... Positive voltage for fly right
Load: ............................ Will drive up to three 1000 ohm loads
8.2.5.2 Lateral Flag Output
A low level valid output to the autopilot indicating the Lateral (LT/RT) signal from the
ACU is valid.
Valid: ............................ 0.4 to 0.8Vdc
Invalid: .......................... Less than 0.05Vdc
Load: ............................ Will drive up to three 1000 ohm loads
NOTE – ACU2 P/N 910-00004-102 does not have a low level flag. It provides a discrete to ground
for energizing an external superflag relay.
8.2.5.3 Vertical Deviation Output
A low level vertical deviation output that is connected to an autopilot vertical (UP/DN)
input. The low side of the differential output is referenced to ground.
Output Voltage: ............. ±150mVdc nominal, tracks the glide slope deviation input
signal to within 5%
Loading: ........................ Up to three 1000-ohm loads
8.2.5.4 Vertical Flag Output
A low level output to the autopilot indicating the UP/DN from the ACU is valid.
Valid: ............................ 0.4 to 0.8Vdc
Invalid: .......................... Less than 0.05Vdc
Load: ............................ Will drive up to three 1000-ohm loads
NOTE – ACU2 P/N 910-00004-102 does not have a low level flag. It provides a discrete to ground
for energizing an external superflag relay.
8.2.5.5 ILS Energize Output
Active low output to an autopilot when an ILS is selected or GPS approach is active.
ILS/GPS APPR Active: ..... Sink to ground
ILS/GPS APPR Inactive: ... Open
Load Current: ................ 100ma maximum
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