PS Engineering PAC24 Installation Manual - 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