PS Engineering PMA8000D Installation Manual User Manual
Page 41
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304
Appendix C
Rev. 6, Oct. 2014
INTERCONNECT NOTES:
1. All wiring must conform to MIL STD 22750 or 27500.
2. All wiring must be #24 AWG or larger, unless otherwise noted.
3. Pins 8 and 9 connected through a 5 A breaker Power and Ground to be #18 AWG or larger. For
best results, power and ground wires should be twisted together for greater noise immunity.
4. All shields should be grounded at respective audio panel only as shown, other end remains float-
ing.
5. All phone and mic jacks must be floating from ground. Insulating washers can be purchased from
PS Engineering, 865-988-9800, P/N 475-003-0001 (Flat Washer) & P/N 475-003-0002 (Shoulder
Washer).
6. Passengers’ intercom expansion unit (P/N 11636R) is connected to copilot audio panel as shown.
Each expansion can support up to 6 passengers. See § 2.5.5.
7. Pin 17 is grounded on copilot panel only.
8. Optional switch for IRS playback.
9. Music 1 in pilot’s panel is only available to the pilot station. Music 1 in copilot panel is available
to that station, and passengers’ intercom. Music 2 is only connected to copilot’s audio panel, and
feeds the expansion unit only. For music distribution information, see § 2.5.1
10. PA Mute is a TTL level logic output that is pulled low when PTT active. Pin 19 is switched to
ground when the PA mode is activated, placing pilot microphone on speaker output while pilot
PTT active. See Sect 2.4.12
11. Reserved
12. For music distribution information, see Section 2.5.1.
13. Reserved
14. Use care when connecting music signal and ground inputs. Refer to section 2.4.1.1 for more in-
formation. Failure to properly interface music can result in added noise.
15. Reserved.
16. Unswitched #2 is selectable over the cockpit speaker
17. Unswitched input #3 is adjustable
18. Unswitched 4 audio low connected to copilot or pilot phone low as convenient, but should NOT
go to music low.
19. Serial Data Interface
20. Grounding Pin 13 places marker Receiver in High Sense mode.
21. For lighting details see §
22. Speaker loads may be required on some older transceivers, consult radio manufacturer.
23. Marker output goes positive when marker lamp is active. Contact PS Engineering to interface to
Sandel SN3308.