
PS Engineering
PAC45J Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-045-2000
Page 2-6
November 2020
2.5 Discrete inputs
2.5.1
Remote ICS mode control. (J452-45)
When a momentary, normally open, push-button switch is connected between pin J452-45 and ground, it will
change the intercom mode on the Pilot’s PAC45J.
2.5.1
OXY (P453-26 or Front Panel Selection)
Activates the Oxygen Mask microphone inputs if configured.
2.5.2
Receive Mute (J452-44)
When J452-44 is grounded through a remote switch,
all
receive audio is muted. If this switch remains closed
for more than 30 seconds (i.e. a stuck switch), the received audio will return to normal
2.5.3
Remote Alert Acknowledge and Alert Programming (P453-23)
A momentary switch connected to P453-23 serves as a remote Alert Acknowledge switch, and
must
be used
to program the Audio Alerts. We recommend installing provisions for this switch is audio alerts are ever
used.
There is a front panel ACK button to acknowledge the alert audio, but it will not allow message programming.
2.5.4
Backlight voltage and adjustment
The white (text) and green (indication) lighting can be adjusted independently.
Adjustment Pot #14 changes the Green LED intensity
Adjustment Pot #15 changes the White LED intensity
See Set switches 47 & 48 ON for dimmer 28V
Set switch 47 –
OFF
& 48-
ON
for 14V dimmer
Set switches 47 & 48 OFF for 5VDC dimmer
By default, adjustments to the pot change the minimum trip point for the dimmer input to full bright. The pot
permits adjustment from 0V to nominal dimmer voltage (28V or 5V depending on configuration).
2.6 Wired Telephone/Satellite Communication input
The PAC45J can accommodate a wired cell phone interface on J452 Pins 58, 59, and 38. Both Bluetooth and
wired Telephone and be accommodated, however, only ONE can be active at a time. Low impedance satellite
phones might require a tactical radio adapter, PS Engineering P/N 12100.
2.6.1 Music Input
NOTE
Use t he l o w-l evel out p ut of any addi t i onal M usi c devi ce t o conn ect t o t he audi o
cont rol l er. Maxi m um si gnal l evel i s
3 V AC
p -p.
DO NO T
use a spe aker -l evel
out put ; t hi s wi l l cause i nt er nal dam age i n t h e audi o cont rol l er .
CAUTION
Local oscillators and internal signals from Music equipment can cause undesired interference
with other aircraft systems. Before takeoff, operate the entertainment devices to determine if there
is any adverse effect within the aircraft systems. If any unusual operation is noted in flight, imme-
diately switch off the entertainment devices.
All additional entertainment devices must be switched off for both takeoff and landing.