PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0008 Appendix A Rev. 8, June 2003
7.1 Dual PAC24 wiring with Observer Configuration Units
Pilot PTT
10
L
12
S
5
J
19
Z
Pilot Phones Lo
Pilot Phones
D
Speaker Lo
Cockpit Speaker Hi
14
N
13
P
16
E
H
T
3
C
4
1
B
Pilot Mic Lo
Pilot Mic PTT
Pilot Mic Audio Hi
15
F
9
R
6
K
X
20
b
NAV
1
Com #1
Com #2 Com #3 Com #4 Com #5
NAV
2
MKR ADF DME
UNSW
1
UNSW
2
ADF Audio Lo
ADF Audio Hi
Mkr Audio In Lo
Mkr Audio In Hi
Com 3 Mic Key
Com 3 Lo
Com 3 Mic Audio Hi
Com 3 Audio Hi
Com 2 Mic Audio Hi
Com 2 Lo
Com 2 Mic Key
Com 2 Audio Hi
Com 1 Mic Audio Hi
Unswitched Audio Lo
Unswitched Input #2 Hi
Unswitched Audio Lo
Unswitched Input #1 Hi
DME Audio Lo
DME Audio Hi
Nav 2 Audio Lo
Nav 2 Audio Hi
NAV 1 Audio Lo
Nav 1 Audio Hi
Com 1 Lo
Com 1 Mic Key
Com 1 Audio Hi
Com 4 Mic Key
Com 4 Lo
Com 4 Mic Audio Hi
Com 4 Audio Hi
Com 5 Mic Key
Com 5 Lo
Com 5 Mic Audio Hi
Com 5 Audio Hi
ADF Audio Lo
ADF Audio Hi
Mkr Audio In Lo
Mkr Audio In Hi
Com 3 Mic Key
Com 3 Lo
Com 3 Mic Audio Hi
Com 3 Audio Hi
Com 2 Mic Audio Hi
Com 2 Lo
Com 2 Mic Key
Com 2 Audio Hi
Com 1 Mic Audio Hi
Unswitched Audio Lo
Unswitched Input #2 Hi
Unswitched Audio Lo
Unswitched Input #1 Hi
DME Audio Lo
DME Audio Hi
Nav 2 Audio Lo
Nav 2 Audio Hi
NAV 1 Audio Lo
Nav 1 Audio Hi
Com 1 Lo
Com 1 Mic Key
Com 1 Audio Hi
Com 4 Mic Key
Com 4 Lo
Com 4 Mic Audio Hi
Com 4 Audio Hi
Com 5 Mic Key
Com 5 Lo
Com 5 Mic Audio Hi
Com 5 Audio Hi
10
L
12
S
5
J
14
N
13
P
16
E
H
T
3
C
15
F
9
R
6
K
Copilot Phones Lo
Copilot Phones Hi
11-33 VDC
21
c
Audio Low
External Speaker Hi
Speaker Lo
Airframe Ground
A
2A
V V
SCL
Music Low
Music In
7
11
Swap
Switch
2
23
22
a
b
Pass Audio Lo
Pax Phones
11-33 VDC
24
c
Audio Low
Airframe Ground
A
2A
Music Low
Music In
7
Playback
2
22
23
a
25
25
Observer Phones Lo
Observer Phones
D
Speaker Lo
Local Speaker Hi
Y Y
SDA
18
14 V dimmer/Swap (Note 2)
U
28 V dimmer/Swap (Note 2)
8
PA Mute (Note 3)
Pilot ICS key
Observer
Playback/ CVR
4
1
Pilot-Copilot
21
Pass ICS in
Pass ICS out
24
19
Z
Observer Mic Lo
Observer Mic PTT
Observer Mic Audio Hi
17
Backlight Lo
Notes: 1. When using Passenger intercom, connect passenger 1 mic to pin (a) of cockpit box and
passenger 2 mic to pin (a) of observer box. Both passenger headsets must be tied to
pin (b) of observer box.
2. For 14V aircraft, connect 18 to dimmer, and use u as the swap input.
For 28 V aircraft, connect u to dimmer, and use 18 as swap input.
Internal DIP switches must be set correctly.
3. PA Mute is a TTL logic output
4. Pin 2 is dual use. Connect to CVR or use IRS playback if DIP switch correcltly set.
Copilot Mic PTT
Copilot Mic Audio Hi
Copilot PTT
Pass Mic Lo
Pass Mic Hi
Pass Mic Lo
Pax Mic Hi
Swap
Switch
18
14 V dimmer/Swap (Note 2)
U
28 V dimmer/Swap (Note 2)
8
PA Mute (Note 3)
17
Backlight Lo
Speaker Lo
PA Speaker Hi
B
(41 pagine)
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