PS Engineering PAC45 User Manual

PS Engineering
PAC45 Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-045-0000 Page 2-6 Rev. 7, May 2019
2.4.6 Unswitched inputs
These inputs are presented to the pilot and copilot regardless of the audio configuration, and
will always mute the crew entertainment inputs. These 510Ω inputs can be used for altimeter
DH audio, GPS waypoint audio, autopilot disconnect tones, or any other critical audio signal.
Unswitched #1 is always presented to the crew headphones, and is available to the pilot in fail-
safe (off) mode.
Unswitched
Input
Input Pins
Hear in
Fail Safe
Hear in
Crew Headset
Adjustable at
installation
1
P452 - 13 WRT 32
Yes
Yes
Yes
2
P452 - 1 WRT 20
No
Yes
Yes
3
P454 - 14 WRT 23
No
Yes
Yes
4
P454 - 13 WRT 22
No
Yes
Yes
Table 2-2 Unswitched inputs
2.4.7 Cockpit Voice Recorder
The PAC45 audio controller contains a Cockpit Voice Recorder output for the pilot and copilot.
Pilot CVR output is P454-12; Copilot CVR output is P454-2, both with respect to CVR low, P454
21
The CVR output is consistent with RTCA DO-214A §1.5.7,
2.4.8 Audio Alerts
The PAC45 contains an independent audio alerting systems that will play up to three alert audio
messages that can be stored by the user (see §3.11.1).
The alert system has a power input (P451-16) that will keep the systems operable if the PAC45
systems power source is removed. Alert audio is provided in Fail-safe when power is on P451-
16.
Alert Input
Input Pins
1
P451 – 11
2
P451 – 12
3
P451 – 13
Alert Power
P451 – 16
Remote
Acknowledge
P454-9
The alert triggers can be configured to be Active High (>4.5 VDC) or Active Low (<0.5 VDC), and
trigger at the leading edge transition or by the voltage level. See §2.5.3 for configuration op-
tions.
Alerts with edge triggers will play three times or until the front panel Acknowledge button (ACK)
is pressed (or the remote ACK P454-9 grounded).
Alerts with level trigger will play three times or until the front panel Acknowledge button (ACK)
is pressed (or the remote ACK P454-9 grounded), or the input level reverts.
When power is applied to the alerts and not the PAC45 audio controller, it will play the message
three times or until the remote acknowledge is selected.
Audio alerts are inhibited for the first 30 seconds after power up to reduce nuisance triggers.
2.4.8.1 Remote ICS mode control.
When a momentary, normally open, push-button switch is connected between pin P454-18 and
ground, it will change the intercom mode on the Pilot’s PAC45.
2.4.9 Wired Telephone/Satellite Communication input
The PAC45 can accommodate a wired cell phone interface on P454 Pins 17, 26 and 7.

PS Engineering PAC45 Specifications

General

Brand	PS Engineering
Model	PAC45
Category	Recording Equipment
Language	English