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PS Engineering PAC24 Installation And Operation Manual

Audio control panel and intercom system
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Download this manual See also: Operation & Installation Manual
9800 Martel Road
Lenoir City, TN 37772
www.ps-engineering.com
PAC24
Audio Control Panel and Intercom System
Document P/N 200-240-0010
Revision 13, September 2007
In certified aircraft, warranty is not valid unless this product is installed by an
Authorized PS Engineering dealer.
PS Engineering, Inc. 2007 ©
Copyright Notice
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS En-
gineering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Mar-
tel Road, Lenoir City, TN 37772. Phone (865) 988-9800, email info@ps-engineering.com.

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  • Page 1 Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS En- gineering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Mar- tel Road, Lenoir City, TN 37772. Phone (865) 988-9800, email info@ps-engineering.com.

  • Page 2: Table Of Contents

    2.4.15 2- O )..........2-10 LAYBACK BUTTON NSTALLATION PTION UNITS ONLY ..........................2-11 DJUSTMENTS ..............2-11 OMMUNICATIONS NTENNA NSTALLATION OTES ................2-11 IRELESS TELECOMMUNICATIONS INTERFACE PAC24 P ......................2-13 IN ASSIGNMENTS ....................2-14 NSTALLATION HECKOUT 2.10 ........................2-14 NSTALLATION 2.10.1 ......................2-14 PERATIONAL HECKOUT 2.11 )............2-15 NTERNAL ECORDER...
  • Page 3 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.4.3 ) ............3-2 EMOTE TRANSFER OF COM TRANSCEIVERS 3.4.4 –0400 )..........3-2 BSERVER TRANSMIT SELECTION PART NUMBER SERIES (1).......................3-3 ECEIVE UDIO ELECTOR 3.5.1 (4) ........................3-3 PEAKER MPLIFIER 3.5.2...

  • Page 4: Section I General Information

    PAC24 Standard, Vertical Orientation 050-240-0500 Where the functions are identical to all units, it will be referred to herein as a PAC24. Otherwise, the appli- cable units will be specified. EQUIPMENT DESCRIPTION The PAC24-series is a state of the art audio isolation amplifier and audio selector that contains an auto- matic voice activated (VOX) intercom system.

  • Page 5: Approval Basis

    PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual A voice activated (VOX) intercom is included in the PAC24. This system has PS Engineering’s exclusive IntelliVox® circuitry that eliminates manual adjustments. The system contains six separate VOX mic cir- cuits, and only opens the specific microphone channel in use.

  • Page 6: Equipment Supplied

    Description Part Number PAC24 PAC24 Audio Control Panel with intercom 050-240-0100 PAC24 Option 1 PAC24 Audio Control Panel with intercom and digital recorder, 050-240-0200 PAC24 Observer PAC24 Audio Control Panel for Observer installation 050-240-0400 PAC24 Observer Option 1 PAC24 Audio Control Panel for Observer with recorder...

  • Page 7: Equipment Required But Not Supplied

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual PAC24 Installation Kit: 250-291-0000 Description Quantity Part Number PAC24 installation rack assembly 475-240-0040 Molex Connector Shell w/key, 50 pin, key 17/18 120-425-5002 Gold Plated Crimp Pins...

  • Page 8: Section Ii - Installation

    2.3.1 Cooling Requirements Forced air cooling of the PAC24 is not required. However the unit should be kept away from heat produc- ing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics) without adequate cool- ing air provided. Outside, ram air cooling of the unit is not permitted, and may result in damage.
  • Page 9 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.3.2.1 Single/Dual configuration Switch Single Copilot Pilot unit –Dual PAC24 unit –Dual Installation Installation Installation Single System/Pilot Copilot Panel J4 ON (installed) J4 OFF (Removed) J5 Jumper Pins 2 &3 J5 Jumper Pins 1 &...
  • Page 10 Pass 3 / Expansion – J3, pin a configuration As shipped, the PAC24 is 5-place intercom, and the ability to convert the system from a 5-place intercom to use an expansion unit that will allow up to 8 places on the intercom per audio panel.
  • Page 11 Backlighting / Swap – J3, pin 18 configuration The installer has the option of implementing PS Engineering’s patented “Swap” function, which allows the pilot to switch between Com 1 and Com 2 with an external switch. The Swap command is controlled through the unused backlight input, and selected by the internal DIP switch.
  • Page 12 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.3.2.10 Observer Installation Configuration (S5) When the Observer versions are used (Part Number 050-240-0400, -0401, -0403, -0404) the cockpit unit is configured as “Pilot” and the Observer station is configured as “Copilot.”...
  • Page 13 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Dual PAC24 - Pilot Panel- 28 Volt Aircraft Dual PAC24- Copilot Panel- 28 Volt Aircraft notes notes J4- On/ J5- Pins 1 & 2 J4- Off J5- Pins 2 & 3...

  • Page 14: Mounting Requirements

    There must be at least 13.8 VDC present at the bottom connector, pin 25, of the PAC24 for the power supply to work in its designed regulation. Otherwise, it can- not adequately attenuate power line noise. Shielding can reduce or prevent radiated noise (i.e., beacon, electric gyros, switching power supplies, etc.) However, installation combinations can occur where inter-...

  • Page 15: Existing Kma 24H Installation

    THE CONNECTIONS BETWEEN THE AUDIO PANELS MUST BE LEFT INTACT. This includes Pins V to V (Key Enable), 21 to 24 (Isolate /Isolate 22) and Y to Y (Private). PS Engineering uses these lines for data bus communications between panels.

  • Page 16: Transmit Interlock

    2.4.12.1 Push to talk intercom The PAC24 can be used as an IntelliVox® intercom, or, as a keyed intercom. Switching J3 pin W to ground will inhibit the IntelliVox® and the intercom squelch will not open until the ICS PTT switch is activated.

  • Page 17: Entertainment Input (J3 Pin 7)

    2.4.13.2 Entertainment inhibit The music input to the PAC24 uses the existing Speaker Power input from the KMA24-71. This pin should be removed even if music is not desired. However, if avionics power remains on Pin 7, there is the possi- bility of power ripple entering the system.

  • Page 18: Adjustments

    PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual nected to pin 2 of J3 of the PAC24, and ground. This pin is shared with the CVR output; therefore the in- ternal DIP switched must be correctly configured (see above).
  • Page 19 Unauthorized use of cellular telephone devices in aircraft is subject to FCC enforcement action, which may include a $10,000 fine per incident. PS Engineering, Inc. does not endorse using unap- proved cellular telephone equipment in flight, and takes no responsibility for the user’s action.

  • Page 20: Pac24 Pin Assignments

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual PAC24 Pin assignments J3 Connector Speaker Lo Aircraft Ground CVR Output PA Speaker Com 1 Mic Aud Com 1 Mic Key Cockpit Spkr Out Pilot Headphones...

  • Page 21: Post Installation Checkout

    Unit Installation To install the PAC24, gently slide the unit into the mounting rack until the hold-down screw is engaged. While applying gentle pressure to the face of the unit, tighten the 3/32" hex-head in the center of the unit until it is secure.

  • Page 22: Internal Recorder Checkout (Optional Units Only)

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 18. Verify that the audio selector panel system does not adversely affect any other aircraft system by sys- tematically switching the unit on and off, while monitoring the other avionics and electrical equipment on the aircraft.

  • Page 23: Section Iii Operation

    Audio Selector Panel/Intercom Systems. Please read it carefully before using the equipment so that you can take full advantage of its capabilities. This section is divided into three sections covering the basic operating areas of the PAC24 systems. They are transceiver selection, audio selector, and intercom.

  • Page 24: Microphone Selector (2)

    There are 10 pushbuttons associated with the communications transceivers. The lower buttons control which transceiver is selected for transmit. The PAC24 gives priority to the pilot’s PTT. If the copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the selected com transmitter.

  • Page 25: Receive Audio Selector (1)

    3.5.2 Key “Click” The PAC24 is equipped with a “click” function that provides an aural feedback to the user in addition to the tactile button push. This sound can be enabled or disabled by simultaneously holding the COM 1 and COM 2 buttons in for at least 5 seconds.

  • Page 26: Split Mode, Dual Panel

    In a dual panel installation, both pilots have access to any combination of transceivers. Because there is cross communication, each PAC24 knows the other unit’s transmitter selection. The audio panel designated as “Pilot’s” will have transmission priority over the panel designated as copilot’s, when both panels are keyed for transmit on the same radio.

  • Page 27: Volume Control (3)

    3.7.3.1 Single Installation Intercom Modes : (Up Position): The pilot connected to the PAC24 is isolated from the intercom and is connected only to the aircraft radio system. He will hear the selected aircraft radio reception (and sidetone during radio transmissions).

  • Page 28: Telephone Mode

    The Com 5 mode can serve as a full duplex interface for telephone systems if the installation is correctly configured. When interfaced with an approved airborne telecommunications system, the PAC24 can serve as an audio control and distribution center. The crewmember’s telephone access is the "Com 5" button on the audio panel.
  • Page 29 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 200-240-0010 Page 3-7 Rev. 13, Sept. 2007...

  • Page 30: Section Iv- Warranty And Service

    PS Engineering, Inc. The risk of loss or damage to the product is borne by the party making the shipment, unless the purchaser requests a specific method of shipment. In this case, the purchaser assumes the risk of loss.

  • Page 31: Appendix A - Installation Drawing

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix A – Installation Drawing 6.165 6.298 (OUTSIDE) (INSIDE) OF THE UNIT 6.485 Key between 17 and 18 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 (INSIDE) 1.248...

  • Page 32: Appendix B Single Interconnect Wiring

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix B Single Interconnect Wi ring 200-240-0010 Appendix A Rev. 13, Sept. 2007...

  • Page 33: Appendix B Dual Interconnect Wiring

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix B Dual Interco nnect wiring UNSW UNSW Com #1 Com #2 Com #3 Com #4 Com #5 (Note 14) (Note 13) 1. All wiring must conform to MIL 22750 or 27500.

  • Page 34: Dual Pac24 Wiring With Observer Configuration Units

    PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Dual PAC24 wiring with Observer Configuration Units UNSW UNSW Com #1 Com #2 Com #3 Com #4 Com #5 Com 1 Audio Hi Com 1 Audio Hi...

  • Page 35: Dual Pac24 Wiring With Observer Configuration And Expansion Units

    14. Pin 2 is dual use. Connect to CVR or use IRS playback if DIP switch set correctly. Nav 1 Audio Hi Nav 1 Audio Hi 15. For passenger intercom using PAC24, connect 22, 23,and a to passenger mics. NAV 1 Audio Lo NAV 1 Audio Lo To use expansion unit (p/n 11606), connect 23, 23, and a as shown in the expansion installation manual.

  • Page 36: Airworthiness

    One method of airworthiness approval is through an FAA Form 337, Major Repair and Alteration (Airframe, Power- plant, Propeller, or Appliance) In the case of the PAC24, you may use the following text as a guide. Installed audio selector and 6-place intercom, PS Engineering PAC24, part number 050-240- (XXX) in ( lo- cation ) at station .
  • Page 37 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix D – RTCA DO160D (EUROCAE ED-14) Enviro nmental Qualification Form Audio Selector Panel/Intercom Part Number: 050-240-0XXX FAA TSO Number: C50c, Class A, Manufacturer: PS Engineering Incorporated 9800 Martel Road...
  • Page 38 PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix F, External PTT Hook Up Part of the installation includes the installation of PTT (Push To Talk) switches that allow the use of your aircraft radio for communications transmissions.

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