EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 94-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
8.3.2
+/- 15Vdc Power Output
The ACU2 o15Vdc and -15Vdc to external equipment such as a Bendix King KA-
52/57.
+15 Range: ....................... +14Vdc to +15.5Vdc at up to 150mA
-15 Range: ........................ -14Vdc to -15.5Vdc at up to 150mA
8.3.3
Glideslope Flag (Narco)
The ACU2 provides a high impedance (10K) glideslope flag input for use with Narco and
other NAV radios unable to drive the standard 1k load.
Valid: ................................ Greater than 260mV across a 10000-ohm load
Invalid: .............................. Less than 100mV across a 10000 ohm load
8.3.4
ARINC 429 Output
The ACU2 transmits the following labels on J3-4/J3-5 (TX2) for GPS receivers and systems
that require ARINC 429 magnetic heading, air data and selected course. Can be
configured High or Low speed.
Note- Except as shown in the wiring diagrams (Section 9) no ARINC 429 interface is
approved under the Aspen STC, and must be approved separately.
ARINC
Label
EFD Data
Rate (ms)
100
Selected Course
200
320
Magnetic Heading
200
203
Pressure Altitude
200
204
Baro Corrected Altitude
200
Table 8-9: ACU2 ARINC 429 Output
8.4
EFD Pin Out
Pin
Number
Name
Input /
Output
Function
1
POWER
-
Main DC power input
2
POWER
-
“
3
POWER
-
“
4
GND
-
Main DC ground
5
GND
-
“
6
GND
-
“
7
Digital Discrete OUTPUT
n/a
8
RS-232RX1
INPUT
RS-232 RX1 (115kb)
9
RS-232RX2
INPUT
RS-232 RX2
10
RS-232RX3
INPUT
RS-232 RX3
11
RS-232RX4
INPUT
RS-232 RX4
12
RS-232RX5
INPUT
RS-232 RX5
13
RS-232TX1
OUTPUT
RS-232 TX1
14
RS-232TX2
OUTPUT
RS-232 TX2
15
RS-232TX3
OUTPUT
RS-232 TX3
16
ARINCRX1A
INPUT
ARINC Receiver 1
17
ARINCRX1B
INPUT
ARINC Receiver 1
18
ARINCRX2A
INPUT
ARINC Receiver 2
19
ARINCRX2B
INPUT
ARINC Receiver 2
