PS Engineering PAC24 Installation Manual User Manual
Page 12
PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0010
Page 2-5
Rev. 24, Dec. 2013
2.3.2.4
Pass 2 / Expansion - J3, pin 23 configuration (S3)
Switch
S3
3
ON
OFF
4
OFF
Pass 2 mic input
ON
Expansion audio
output
2.3.2.5
CVR / IRS Control – J3, pin 2 configuration (S2
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
Switch
S2
1
ON
OFF
2
OFF
CVR Output
ON
IRS Playback Input
2.3.2.6
14-Volt Backlighting / Swap – J3, pin 18 configuration (S4)
The installer has the option of implementing PS Engineering’s patented “Swap” function, which allows
the pilot to switch between Com 1 and Com 2 with an external switch. The Swap command is controlled
through the unused backlight input, and selected by the internal DIP switch.
Switch
S4
1
ON
OFF
2
OFF
14 V lighting
control
ON
Swap switch
2.3.2.7
28-Volt Backlighting / Swap – J3, pin U configuration (S4)
Switch
S4
3
ON
OFF
4
OFF
28 V lighting
control
ON
Swap switch
2.3.2.8
Backlight 14/28V
Switch
14 V
28V
1
On
Off
2
Off
On
3
Off
On
4
On
Off