PS Engineering
PMA450C Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0800
Appendix C
July 2022
Appendix C – J2 Connector Interconnect
22
20
31
16
1
35
36
24
23
25
4
3
2
Copi lot Phones (R)
Copi lot Phones (L)
Copi lot Phones Lo
Pass. 1 Mic Jack
Pass . Mic Lo
Pass . Mic Hi
37
38
Pass. 2 Mic Jack
Pass . Mic Lo
Pass . Mic Hi
39
40
Pass. 3 Mic Jack
Pass . Mic Lo
Pass . Mic Hi
41
42
Pass. 4 Mic Jack
Pass . Mic Lo
Pass . Mic Hi
32
33
34
Copi lot Mi c Audio
Copi lot PT T
Copi lot Mi c Lo
Copilot PTT
Copi lot Mi c Jack
14
13
Ent. #2 Mute
12
Pl ayback
PMA450C J2 CONNECTOR
(Sub-D 44-pin male on tray)
Ent. #2 Input
27
26
28
Ent. #2 Audio (R)
Ent. #2 Audio (L)
Ent. #2 Audio Lo
Notes:
Ent. #1 Audio (R)
Ent. #1 Audio (L)
Ent. #1 Audio Lo
Ent. #1 Input
5
6
7
Copi lot PhonesJack
Pil ot Phones (R)
Pil ot Phones (L)
Pil ot Phones Lo
Pilot PhonesJack
14/28 Volt Lights Hi
14 V Lights Hi/28V Lights lo
Lights Lo
8
9
Ground Lug
Airframe Ground
11-33 VDC
PA Mute
18
Speaker Hi
Speaker Lo
44
43
Swap
Switch
Swa p
10
11
Cockpit Speaker
1. All Power, and Ground wires must be #22 gage wire
Lighting #22 AWG, other wires minimum #24 AWG.
2. All shields should be grounded at audio panel only,
other end remains floating
3. Pins 8 and 9 connected through a 5 A breaker.
4. PA Mute is a TTL logic level that is
pulled low when radio PTT active, for external systems
5. All shielded wires must be MIL 22750 or 27500.
6. Optional switch to remotely activate playback
7. For music distribution information, see Section 3.9
8. Pin 12 is switched to ground when the PA mode is activated,
placing pilot microphone on speaker output while pilot PTT active.
See Sect 2.4.10.2.
9. AUX enable goes low when SW#3 is selected.
Should NOT be used when audio source is installed and played through
SW3
10. Reserved
11. No connection to Pin 17, 19, 21, 29, 30.
12. Use care when connecting music signal and ground inputs.
Refer to section 2.4.12 for more information.
Failure to properly interface music can result in
added noise.
13. Unswitched 4 audio low connected to copilot or
pilot phone low as convenient,
but should NOT go to music low
14. This switch toggles Music 2 mute on and off.
Unswi tc hed Input #4 Hi
Unswi tc hed Audi o Lo
Unswitched Audio #4
15
See Note 9
7
6
5
28 V Lights Hi
28-Volt lights lo
7
6
5
14 V Lights Hi
14-Volt lights lo
AUX Enable
See Note 14
5A Breaker
See Note 3
Note 6
Note 12
Note 13
