Pa Mute (J2, Pin 12); Miscellaneous Logic Output (J2, Pin 18); Marker High Sensitivity (J2 Pin 13); Intercom Wiring Entertainment - PS Engineering PMA8000C Installation And Operator's Manual

Public Address
Enabled
Figure 2-2 Jumper Locations
4. Place the lid back on the unit, aligning holes.
5. Install and tighten qty. 4 long thread screws into the lid.

2.4.12 PA Mute (J2, Pin 12)

Pin 12 of J2 is a TTL logic output that is pulled low during PTT operation.

2.4.13 Miscellaneous Logic Output (J2, Pin 18)

Pin 18 of the J2 connector is pulled to ground whenever the AUX button is depressed. This serves as a con-
trol line for external devices, such as an entertainment system that the pilot wishes to control.
J2, Pin 18 should NOT be used if the AUX is going to be used to switch DME or auxiliary audio.

2.4.14 Marker High Sensitivity (J2 Pin 13)

The PMA8000C defaults to LOW marker sensitivity of 1000µVolts. If High marker beacon sensitivity is
desired, J2 Pin 13 can be connected to ground (or J2 pin 14), through a switch, to set the marker beacon
sensitivity to 200 µVolts.
2.5 Intercom wiring
See Appendix C and D for intercom connection configurations. It is critical to the proper operation of this
system to have this connector wiring made in accordance with these diagrams. Use 2- and 3-conductor,
MIL-spec cable as shown. Connect the shields at the audio panel end only, and tie to the audio low inputs
as shown.
The audio panel harness can be custom made by PS Engineering, Inc. Simply call the factory or
engineering.com to obtain a wire harness work sheet. The harness will be made to your specifications and
fully functionally tested. Harness can be ordered with jack, or without the intercom jacks installed, for easi-
er wire routing through the aircraft.
2.5.1 Entertainment Inputs
The PMA8000C has two INDEPENDENT music inputs, PLUS a front mounted jack that is connected to
Entertainment 1. Entertainment input number 1 is J2 pins 23 (left channel) and 24 (right channel), with
respect to pin 25, and Entertainment number 2 is connected to 26 (left channel), 27 (right channel), with
respect to 28.
200-890-0303
PS Engineering
PMA8000C Audio Selector Panel and Intercom System
Installation and Operator's Manual
NOTE
NOTE
Page 2-7
Public Address
Disabled
www.ps-
Rev. 5, May 2015