PS Engineering PAC24 Installation And Operation Manual page 10

2.3.2.2 Pass 3 / Expansion – J3, pin a configuration
As shipped, the PAC24 is 5-place intercom, and the ability to convert the system from a 5-place intercom
to use an expansion unit that will allow up to 8 places on the intercom per audio panel.
Switch
3 ON
4 OFF
2.3.2.3 Pass 1 / Expansion – J3, pin 22 configuration
Switch
1
ON
2
OFF
2.3.2.4 Pass 2 / Expansion - J3, pin 23 configuration
Switch
3 ON
4 OFF
2.3.2.5 CVR / IRS Control – J3, pin 2 configuration
PAC24 units can be equipped with an optional Intercom Recording System (IRS, P/N –0200, -0401),
which will store up to 60 seconds of radio traffic (on the transceiver selected for transmit). The playback
control is a normally open switch connected to ground, which triggers the stored audio.
Internal Recording System units are incompatible with the standard Cockpit Voice Recorder output
200-240-0010
PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator's Manual
J5
S2
Pass 3 Mic Input
S3
Pass 1 mic input
S3
Pass 2 mic input
Page 2-3
Pin 1
J4
OFF
Expansion Power
out
ON
OFF
Expansion audio
input
ON
OFF
Expansion audio
output
ON
Rev. 13, Sept. 2007