Owner manual
ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
453-6500
25-69-10
Page 46 of 58
APR 30/12
SUBTASK 25-69-10-450-001
B. ELT and Navigation System Interfaces
CAUTION
: DO NOT CONNECT THE ELT/NAV INTERFACE POWER WIRE DIRECTLY TO THE
BATTERY. THE UNIT DRAWS POWER WHENEVER POWER IS APPLIED TO IT AND
COULD DRAIN THE AIRCRAFT BATTERY WHEN NOT IN USE.
(1) See "Figure 8. ELT/NAV Interface Wiring Diagram".
Figure 8. ELT/NAV Interface Wiring Diagram
(2) Fabricate a shielded 4-wire harness long enough to reach between the ELT/NAV Interface and
the ELT, including strain relief and drip loop.
(a) Strip approximately 0.15 in. (3 mm) of insulation from the ELT receptacle end of the four
cable wires and 0.19 in. (5 mm) from the ELT/NAV Interface end.
(b) Dress and tin the bare wire ends to prevent the strands from fraying during terminal
crimping operations.
(3) Fabricate a shielded, twisted pair ARINC 429 data cable.
NOTE
: Single. shielded wire for RS-232 data line.
(a) Strip approximately 0.19 in. (5 mm) of insulation from the ELT end of the twisted pair.
(b) Dress and tin the bare wire ends to prevent the strands from fraying during terminal
crimping operations.
(c) Prepare the twisted pair wires at the navigation system end in accordance with the
navigation system manufacturer’s written instructions.
2 4 1 3 6 7 5 8
SEE APPLICABLE ELT
WIRING DIAGRAM
ELT
ELT/NAV INTERFACE
24-BIT ADDRESS
(BINARY)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
2
9
10
12
1
3
4
5
6
7
8
11
10
9
12
11
+5.6 VDC
RXDB
TXDB
GND
+28 VDC
ARINC 429 - A
ARINC 429 - B
NOT USED
NOT USED
NOT USED
RS-232 RX
FROM ARINC 429
(STANDARD OR GAMA
HIGH OR LOW SPEED)
ADD 1
ADD 2
ADD 3
ADD 4
ADD 5
ADD 6
ADD 7
ADD 8
ADD 9
ADD 10
ADD 11
ADD 12
ADD 13
ADD 14
ADD 15
ADD 16
ADD 17
ADD 18
ADD 19
ADD 20
ADD 21
ADD 22
ADD 23
ADD 24
GND
GND
P1
P2
MSB
LSB
SWITCHABLE POWER SOURCE WITH 2-AMP BREAKER OR
SLO-BLO FUSE.
1
1
AIRCRAFT
GROUND (TYP.)
USE MINIMUM 22 AWG WIRE
P2
ELT/NAV INTERFACE MATING PLUG
(24-POSITION)
PIN INSERTION VIEW
P1
24-BIT ADDRESS PLUG
(31-POSITION)
PIN INSERTION VIEW
2
2
P1 CAPPED IF NOT IN USE.
3
3
USED ONLY WITH 24-BIT ADDRESS LOCATION PROTOCOLS.
1
10
20
30
1
13
20
24