PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0010
Page 2-8
Rev. 29, Sept. 2021
PAC24 Rear Connector
2
a
CVR Audio
No Connect
Pass 3
Expansion power
S2
22
23
Pass 1 Mic
Expansion in
Pass 2 Mic
Expansion out
S3
18
U
14V light Hi
Swap
28V light hi
Swap
S4
Expansion Active
Dual System
Copilot Unit
TEL/Duplex
S5
Logic
+5
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
Figure 2-5 DIP switches shown schematically
General Notes
•
If telephone is connected, turn SW5-4 to ON for all panels. Otherwise set it to OFF
•
For 14V aircraft, change SW4 1-4 to ON, OFF, OFF, ON
•
For CVR output, change SW2 1-2 to ON, OFF. NOTE: IRS cannot be used
2.3 Equipment Installation Procedures
2.3.1
Mounting Requirements
The PAC24 must be rigidly mounted to the instrument panel of the aircraft structure and within view and
reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13-2A. The unit
may be mounted in any area where adequate clearance for the unit and associated wiring bundle exist.
Avoid installing the audio panel close to high current devices or systems with high-voltage pulse type out-
puts, such as DME or transponders.
NOTE
: The mounting hole configuration for the PAC24 is identical to the
KMA-24H -71 Audio Selector Panels.