PS Engineering PAC24 Installation Manual - Manual (Page 38)

PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0010 Appendix B Rev. 24, Dec. 2013
7.3 Dual PAC24intercom audio wiring with Observer Configuration (050-240-0400, -0401 ONLY) and expansion units
Pilot PTT
19
Z
Pilot Phones Lo
Pilot Phones D
Speaker Lo
Cockpit Speaker Hi
4
1
B
Pilot Mic Lo
Pilot Mic PTT
Pilot Mic Audio Hi
X
20
b
Copilot Phones Lo
Copilot Phones Hi
11-33 VDC
24
c Audio Low
PA Speaker Hi
Speaker Lo
Airframe Ground
A
2A
V V SCL
Music Low
Music In 7
Swap
Switch
2
23
22
24
11-33 VDC
c
Airframe Ground
A
Music Low
Music In 7
CVR Output
2
22
23
25
25
Observer Phones Lo
Observer Phones D
Speaker Lo
Local Speaker Hi
Y Y SDA
18
14 V dimmer/Swap (Notes 12, 16)
U
28 V dimmer/Swap (Notes 12, 16)
8
PA Mute (Note 8)
Observer
CVR Output
11
Pilot ICS key
4
1
Pilot-Copilot
b
Pass ICS in
19
Z
Observer Mic Lo
Observer Mic PTT
Observer Mic Audio Hi
17
Backlight Lo
Copilot Mic PTT
Copilot Mic Audio Hi
Copilot PTT
Swap
Switch
18
14 V dimmer/Swap (Notes 12 & 16)
U
28 V dimmer/Swap (Notes 12 & 16)
8
PA Mute (Note 8)
17
Backlight Low
Speaker Lo
PA Speaker Hi B
W
ICS Key Enable
M
Copilot ICS key
11
W
Observer ICS key
ICS key enable
1. All wiring must conform to MIL 22750 or 27500.
2. All shields should be grounded at audio panel only,
other end remains floating.
3. All phone and mic jacks must be floating from ground.
4. Speaker low must be connected as shown,
and not to other audio low.
5. For expansion unit, use part number 11606 or 11606R only.
6. Pins V, Y, and 24 are used to connect in dual systems.
7. Pins M, W, and 11 are use in cases where a
Push-to-talk intercom is desired. (Section 2.4.12.1)
8. PA Mute is TTL Level logic low when transmit PTT is active.
9. For music distribution information, see Section 2.4.13
10 All wiring must be #24 AWG or larger, unless otherwise noted.
11. Power and Ground to be #18 AWG or larger.
For best results, power and ground wires should be twisted
together for greater noise immunity.
12. See Section 2.3.2 for details on dual mode pins selected through DIP.
13. In TEL Mode, COM 5 Mic audio should be connected to both audio panels.
Observer audio will be routed through pilots panel to phone.
Leave PTT open to COM 5 if not required for duplex operation.
14. Pin 2 is output to CVR
15. For passengers, use IntelliPAX expansion unit.
To use expansion unit (p/n 11616), connect 23, 23, and a as shown in the expansion
installation manual.
16. 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.
17. DME not connected in -0500, -0503.
18. The passenger and cross tie interface
IS NOT IDENTICAL to a standard dual installation.
19. Do not connect speakers to more than one output. See section 2.4.11
Note 7
Note 7
IntelliPAX Expansion Unit
PN 11606
15
2
14
Expansion Input
Expansion Output
3
PAC24 Cockpit Unit
050-240-0400 & -0401 ONLY
PAC24 Observer Unit
050-240-0400 & -0401 ONLY
+9V DC Expansion Power 1 a
See 11606 manual
diagram for more information
Expansion Ground
NOTE 18
Dual Installation Notes
Notes 4 & 19
Notes 4 & 19