PS Engineering
PCD7100 Series Intercom System with Integral Music System
Installation and Operator’s Manual
2.4.6 Playback Installation (11951, 11957 only)
To install the IRS, a momentary, normally open, push button switch is required. This switch can be located
any where in cockpit convenient to the pilot's reach. The switch must be connected to pin Y of the
PCD7100.
2.4.7 Unswitched Audio Input (11950, 11951, 11956, 11957 only)
The PCD7100-I has an audio input that is provided to the pilot headset. Pins 16 (right) and 18 (left) with
respect to audio low (pin E) are presented to the pilot headset through an audio buffer.
2.4.8 Unswitched Summed Audio (11952, 11953, 11954, 11958 only)
PCD7100-P, player units have four audio inputs that are summed together and presented to the aural warn-
ing output, J1 pin 18 WRT V.
NOTE: These can be used to implement additional audio warnings when connected to the appropriate
Unswitched audio input of an audio panel. This includes Autopilot warnings, TAWS, GPS alerts, Radio
Altimeter, etc.
2.4.9 Audio Message System (11953, 11954 only)
The audio message installation requires inputs from an external annunciator, such as an Electronics Inter-
national engine gage system. A falling edge (input pulled low) when applied to the appropriate pin of the
connector will cause the message to be played, repeating every two seconds, until the acknowledge
(“ACK”) button is pushed.
Install the “ACK” button in a location convenient to the pilot and copilot position. This switch is a momen-
tary SPST switch between Pin 4 and signal ground (18).
The following table contains information regarding various inputs.
Function EGT or CHT
Fuel
Flow or
Level
Oil Pres-
sure or
temperature
Volt/
Amp
RPM Manifold
Pressure
PCD7100 Pin
5
8
6
9
7
10
Message Number
1
2
3
4
5
6
Message Text
“Check tem-
perature”
“Check
fuel”
“Check
oil”
“Check
battery”
“Check en-
gine speed”
“Check boost”
Other combinations can be created at additional cost.
NOTE: PS Engineering can only provide input information at this time.
Approval basis is the responsibil-
ity of the installer
. Contact PS Engineering for more information.
2.5 Adjustments
The PCD7100 is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. The only service adjustment is passenger headset volume control. These are set for maximum at the
factory, but may be attenuated at installation if desired by accessing two adjustment pots.
200-971-0005
Page 2-4
Rev. 5, Dec. 2002
