PS Engineering PMA8000B Installation Manual - Manual (Page 14)

PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0101 Page 2-7 Rev. 4, April 2012
2. Move the blue jumper located in the back corner near the sub-D connectors so it sits on both pins
of J4. See Figure #2-3.
Figure 2-3 Jumper Location
4. Place the lid back on the unit, aligning holes.
5. Install and tighten qty. 4 long thread screws into the lid, and one short screw on the rear.
2.4.12 PA Mute (J2, Pin 12)
Pin 12 of J2 is a logic output that is pulled low during PTT operation. This output from the audio panel is
sometimes used as an input to external public address system to prevent PA feedback during transmis-
sions.
2.4.13 Miscellaneous Logic Output (J2, Pin 18)
Pin 18 of the J2 connector is connected to aircraft ground whenever the AUX button is turned on. This
serves as a control line for external devices, such as an entertainment system that the pilot wishes to con-
trol.
This pin can also be used to control passenger (Music 2) Karaoke Mode, by connecting to pin 13 of J2.
NOTE
J2, Pin 18 should NOT be used if the AUX is going to be used to switch DME or auxiliary audio.
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.
NOTE
The intercom harness can be custom made by PS Engineering, Inc. Simply call the factory or www.ps-
engineering.com to obtain a wire harness work sheet. The harness will be made to your specifications and
Jumper Off (no
PA mode)
Jumper On
(PA mode
enabled)