PS Engineering
PMA450B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0600
Page 2-14
Rev. 5, August 2020
PMA450B Pin assignments
J1 Function
J2 Function
1 Marker Antenna
1 Pilot Phones Lo
2 Marker Ant Lo
2 Copilot Phones Lo
3 TEL Audio Hi
3 Copilot Phones (L)
4 TEL Audio Lo
4 Copilot Phones (R)
5 TEL Mic Audio
5 Lights lo
6 No Connect
6 14/28 V Lights
7 SW#1 (ADF Audio) In
7 14/28 V Lights
8 SW#1 (ADF Audio) Lo
8 Aircraft Power
9 Com 1 Audio
9 Aircraft Power
10 Com 1 Audio Lo
10 Aircraft Ground
11 Com 1 Mic
11 Aircraft Ground
12 Com 1 Mic Key
12 PA Mute
13 Com 2 Audio
13 Mute Inhibit
14 Com 2 Audio Lo
14 Mute Inhibit Lo
15 Com 2 Mic
15 Unswitched #4
16 No Connect
16 Pilot Phones (L)
17 Nav 1 Audio
17
Alert
Trigger #1
18 Nav 1 Audio Lo
18 RESERVED
19 Nav 2 Audio
19
Alert Trigger #2
20 Nav 2 Audio Lo
20 Swap/Remote ICS
21 SW#2 (DME) Audio
21 Swap Lo
22 SW#2 (DME) Audio Lo
22 IRS Playback
23 (Aux) Audio*
23 Music 1 (L)
24
Alert Trigger #4
24 Music 1 (R)
25 No Connect
25 Music 1 Lo
26 No Connect
26 Music 2 (L)
27 No Connect
27 Music 2 (R)
28
Aural Message Acknowledge
28 Music 2 Lo
29 Unswitched #3
29 No Connect
30 Com 2 Mic Key
30
Alert Trigger#3
31 Unswitched Audio 1
31 Pilot Phones (Rt)
32 Unswitched Lo
32 Copilot Mic Audio
33 Pilot Mic Audio
33 Copilot Mic PTT
34 Pilot Mic PTT
34 Copilot Mic Lo
35 Pilot Mic Lo
35 Pass 1 Mic Audio
36 Ext IM MKR
36 Pass 1 Mic Audio Lo
37 Ext OM MKR
37 Pass 2 Mic Audio
38 Ext MM MKR
38 Pass 2 Mic Audio Lo
39 MM Sense
39 Pass 3 Mic Audio
40 Pass HP (L)
40 Pass 3 Mic Audio Lo
41 Pass HP (R)
41 Pass 4 Mic Audio
42 Pass HP Lo
42 Pass 4 Mic Audio Lo
43 Unswitched 2 Lo
43 Speaker Lo
44 Unswitched 2 Audio
44 Speaker Output
*AUX will be present when SW2 (21) is on
Table 2-4: PMA450B Pin Assignments. Bold denotes flightmate® functions
