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PS Engineering

PAC24 Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

200-240-0008 Appendix A Rev. 8, June 2003

7.2 Dual PAC24 wiring with Observer Configuration and expansion units

Pilot PTT

Pilot Phones Lo

Pilot Phones

Speaker Lo

Cockpit Speaker Hi

Pilot Mic Lo

Pilot Mic PTT

Pilot Mic Audio Hi

NAV

Com #1

Com #2 Com #3 Com #4

Com #5

NOTE 13

NAV

MKR ADF DME

UNSW

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

Copilot Phones Lo

Copilot Phones Hi

11-33 VDC

Audio Low

External Speaker Hi

Speaker Lo

Airframe Ground

SCL

Music Low

Music In

Swap

Switch

11-33 VDC

Audio Low

Airframe Ground

Music Low

Music In

Playback (Note 14)

Observer Phones Lo

Observer Phones

Speaker Lo

Local Speaker Hi

SDA

14 V dimmer/Swap (Note 12)

28 V dimmer/Swap (Note 12)

PA Mute (Note 8)

Observer

Playback/ CVR (Note 14)

Pilot ICS key

Pilot-Copilot

Pass ICS in

Observer Mic Lo

Observer Mic PTT

Observer Mic Audio Hi

Backlight Lo

Copilot Mic PTT

Copilot Mic Audio Hi

Copilot PTT

Pass Mic Lo

Pass Mic Hi

Swap

Switch

14 V dimmer/Swap (Note 12)

28 V dimmer/Swap (Note 12)

PA Mute (Note 17)

Backlight Low

Speaker Lo

PA Speaker Hi

ICS Key Enable

Copilot ICS key

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. To have 3 passengers in addition to copilot, connect to jacks.

OR : For expansion unit, use part number 11606 or 11606R only.

6. Pins V, Y, 21 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 main audio panel ONLY

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 dual use. Connect to CVR or use IRS playback if DIP switch set correctly.

15. For passenger intercom using PAC24, connect 22, 23,and a to passenger mics.

To use expansion unit (p/n 11606), 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. PA Mute is a TTL logic output

18. The passenger and cross tie interface

IS NOT IDENTICAL to a standard dual installation.

Note 7

IntelliPAX Expansion Unit

PN 11606

Expansion Output

Expansion Input

PAC24 Cockpit Unit

PAC24 Observer Unit

+9V DC Expansion Power

See Observer - 11606 wiring

diagram for more information

Expansion Ground

NOTE 18

1 2 ... 28 29 30 31 32 33 34 35

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PS Engineering PAC24 Specifiche Pagina 33

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