9800 Martel Road Lenoir City, TN 37772 www.ps-engineering.com PAC24 Audio Control Panel and Intercom System Installation and Operation Manual FAA-Approved TSO C50c JAA-Approved JTSO C50c Document P/N 200-240-0010 Revision 24, Dec. 2013 In certified aircraft, warranty is not valid unless this product is installed by an Authorized PS Engineering dealer. PS Engineering, Inc.
Table of Contents SECTION I GENERAL INFORMATION................................................................................................... 1-1 1.1 INTRODUCTION..................................................................................................................................... 1-1 1.2 SCOPE ...................................................................................................................................................... 1-1 1.3 EQUIPMENT DESCRIPTION ................
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.5.2 KEY “CLICK” ........................................................................................................................................... 3-3 3.6 SPLIT MODE................................................................................................................................................ 3-3 3.6.1 SPLIT MODE, SINGLE PANEL ...................................................
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Section I GENERAL INFORMATION 1.1 INTRODUCTION The PAC24 represents the finest in high-performance cockpit audio control and intercommunications. Using proprietary IntelliVox® design, this unit eliminates the requirements for intercom squelch adjustments. The unit is designed for outstanding ergonomics and visually defined mode annunciation and selection.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Push button switches select the communication transceivers in use for the pilot and copilot position, and allow radio transmission. In "Split Mode" the PAC24 has the ability to allow the pilot and copilot to operate different transceivers independently.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Specifications, Continued. POWER REQUIREMENTS (Including Internal Lighting): Voltage: 11 to 33 VDC Maximum Current: 2.5 Amp (Externally protected by a 3 Amp circuit breaker.) Typical operating current: Speaker off: 350 mA Speaker on, 28V, full radio volume 1.5 A Audio Selector Specifications Audio selector panel input impedance: 510 Input Isolation: -60 dB (min.) Speaker Muting: -60 dB (min.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual PAC24 Installation Kit: 250-240-0001 Description Quantity Part Number PAC24 installation rack assembly Molex Connector Shell w/key, 50 pin, key 17/18 1 1 475-240-0040 120-425-5002 Gold Plated Crimp Pins 4 40 X 7/16 screw w/nylon patch Grounding bar 6-32 X 3/4 pan head Phillips screw 6-32 Nut Flat 6-32 Lock Nut Cable Clamp #6-32 x ½” Flat head Phillips screw #6-32 Clip Nut Parts identification sheet
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Section II - Installation 2.1 GENERAL INFORMATION 2.1.1 SCOPE This section provides detailed installation and interconnect instructions for the PS Engineering PAC24Series Audio Control Panel/Intercom System. Please read this manual carefully before beginning any installation to prevent damage and postinstallation problems. Installation of this equipment requires special tools and knowledge.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual To access the DIP switches, remove the top cover by removing the two (2) screws at the sides holding the cover in place. DIP Switches 4 3 2 1 4 3 2 1 S4 S3 4 3 2 1 4 S2 3 2 1 S5 Figure 2-1 DIP Switch locations 200-240-0010 Page 2-2 Rev. 24, Dec.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual PAC24 Rear Connector S2 1 CVR Audio 2 2 Playback 3 Pass 3 a 4 Expansion power S3 1 Pass 1 Mic 22 2 Expansion in 3 Pass 2 Mic 23 4 Expansion out S4 1 14V light Hi 18 2 Swap 3 28V light hi U 4 Swap +5 S5 1 Expansion Active 2 Dual System 3 Logic Copilot Unit 4 TEL/Duplex Figure 2-2 DIP switches shown schematically 2.3.2.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Pin 1 J5 J4 Figure 2-3 Pilot/Copilot panel Jumper Location Switch S5 2 OFF 3 OFF Single PAC24 Installation ON Pilot unit –Dual Installation OFF ON Copilot unit – Dual Installation ON Table 2-1 Pilot/Copilot Dual Panel Selection Switch (S5) 2.3.2.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.3.2.4 Pass 2 / Expansion - J3, pin 23 configuration (S3) Switch 3 S3 OFF ON Expansion audio output Pass 2 mic input 4 2.3.2.5 ON OFF CVR / IRS Control – J3, pin 2 configuration (S2 PAC24 units can be equipped with an optional Intercom Recording System (IRS, P/N –0200, -0401), which will store up to 60 seconds of radio traffic (on the transceiver selected for transmit).
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 14 V Aircraft 2.3.2.9 28 V aircraft Pin 18= 14 V input Pin 18=Swap Pin U=Swap Pin U =28 V input Expansion Mode / Telephone configuration (S5) Switch S5 1 On Expansion Unit Present (11606 installed) 4 On Duplex Telephone mode for Com 5 NOTE: Set both audio panels the same in a dual installation 2.3.2.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Table 2-2 Single Audio Panel DIP switch settings Dual PAC24 - Pilot Panel- 28 Volt Aircraft Dual PAC24- Copilot Panel- 28 Volt Aircraft 1 2 3 4 SW2 ON OFF ON OFF SW3 ON OFF ON OFF SW4 OFF ON ON OFF SW5 OFF ON OFF See notes 1 2 3 4 SW2 ON OFF ON OFF J4- On/ J5- Pins 1 & 2 SW3 ON OFF ON OFF SW4 OFF ON ON OFF SW5 OFF ON ON See notes J4- Off J5- Pins 2 & 3 Table 2-3 Dual Audio Panel DIP Switch S
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.3.4 For IRS, change SW2 1-2 to OFF, ON. NOTE: CVR cannot be used Mounting Requirements The PAC24 must be rigidly mounted to the instrument panel of the aircraft structure and within view and reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13-2A. The unit may be mounted in any area where adequate clearance for the unit and associated wiring bundle exist.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual minimum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better).Under no circumstances combine a microphone and headphone wiring into the same shielded bundle. Always use a 2- or 3-conductor, shield wire as shown on the installation wiring diagram. Radiated signals can be a factor when low level microphone signals are "bundled" with current carrying power wires.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.4.5 Audio Panel interface The PAC24 is designed to interface with standard aircraft avionics, and presents a 500 receiver impedance. For best results, a twisted-shielded cable is recommended from the avionics audio source to the audio panel, with the shield grounded at the audio panel end.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.4.12 Intercom wiring See Appendices 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. 2.4.12.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual NOTE: When a panel mounted IntelliPax (11606) expansion unit is used, both the PAC24 and the panel mounted expansion volume controls are both active. We recommend turning the expansion unit volume control completely CCW (lowest) and then using the PAC24 volume control to adjust the passengers’ volume.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual PA Volume Master Volume Figure 2-4- PAC24 Adjustments 2.6 Communications Antenna Installation Notes For best results while in Dual installations or Split Mode (two communicates transceivers active at the same time), we recommend that the one VHF communications antenna is located on top of the aircraft while the other communications antenna is installed on the bottom.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Cellular Plug (typical) Cellular Phone Tip= Microphone out Ring= Speaker audio Interconnect Base=Ground PAC24 Connector R 6 c Com 5 Audio COM 5 Mic Input Audio Lo 1/8" Cellular Jack For Duplex (cell phone) operation Internal DIP Switch SW5, switch 4 must be turned on This is a typical interconnect PS Engineering does not guarantee compatability in all cases. 200-240-0010 Page 2-14 Rev. 24, Dec.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.9 Post Installation Checkout After wiring is complete, verify power is ONLY on pin 25 of the J3 and airframe ground on bottom connector pin A. Failure to do so will cause serious internal damage and void PS Engineering's warranty. 2.10 Unit Installation To install the PAC24, gently slide the unit into the mounting rack until the hold-down screw is engaged.
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 systematically switching the unit on and off, while monitoring the other avionics and electrical equipment on the aircraft. 2.11 Internal Recorder Checkout (Optional units only, -0200 and -0400) With headset plugged into pilot’s side jacks, tune COM 1 to local frequency, such as FSS or ATC ground.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Section III OPERATION GENERAL INFORMATION 3.1 SCOPE This section provides detailed operating instructions for the PS Engineering PAC24 High Performance 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.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.3.2 Dual Panel Fail Safe Operation In a dual installation, the PAC24 designated as Pilot’s at installation, will default to Com 1. The audio panel designated as copilot will not operate in the off position. This prevents compromising the pilot’s audio capability in the event of a dual audio panel problem. 3.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual The pilot and copilot have access to all transceivers. The observer can access any radio but the crew will have transmit priority. If the crew selects a radio for transmit that the observer has previously selected, all parties can transmit, but the pilot, copilot, have priority over the observer (in that order). The crew has priority on all radios. The observer can listen to all radios if desired. 3.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Pilot on Com 2, with copilot on Com 3, Com 4 or Com 5, is also possible. Note: Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot. Copilot does not hear other selected radios. 3.6.2 Split Mode, Dual Panel In a dual panel installation, both pilots have access to any combination of transceivers.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual For optimum microphone performance, PS Engineering recommends installation of a Microphone Muff Kit from Oregon Aero (1-800-888-6910). This will not only optimize VOX performance, but will improve the overall clarity of all your communications. Table 3-1 Mic Muff ™ Part Numbers Manufacturer Bose David Clark Lightspeed Peltor Pilot Model Dynamic Electret M87 Dynamic H10-30 H10-20, H10-40 H10-13.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.7.3.2 Dual Installation Intercom Modes ISO: (Up Position): The primary 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).
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual In a single installation, the intercom mode select switch determines who is on the phone: ISO - pilot CREW - pilot and copilot and passengers ALL - pilot, copilot, passengers In a standard dual installation, the pilot and copilot can select TEL (Com 5) mode independently by pressing their respective COM5 Xmt button.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Section IV- Warranty and Service 4.1 Warranty In order for the factory warranty to be valid, the installations in a certified aircraft must be accomplished by an FAA-certified avionics shop and authorized PS Engineering dealer. If the unit is being installed by a non-certified individual in an experimental aircraft, a factory-made harness must be used for the warranty to be valid. PS Engineering, Inc.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix A – Installation Drawing C L OF THE UNIT 6.165 (INSIDE) 6.298 (OUTSIDE) 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 1 1.248 (INSIDE) 1.312 (OUTSIDE) J1 c b a Z Y XW V U T S R P N M L K J H F E D C B A Rear Connector (Viewed from front) 0.320 5.570 6.450 6.690 200-240-0010 Appendix B Rev. 24, Dec.
200-240-0010 DME Audio Hi DME Audio Lo DME Receiver Appendix B See Notes 1 & 2 See Note 18 Unswitched Input #2 Hi Unswitched Audio Lo Unswitched Audio Lo Unswitched Input #1 Hi See Notes 13 & 14 23 Expansion Output 11-33 VDC 3A See Note 11 Airframe Ground W 11 M V 21 24 Y A 25 2 8 18 See Note 17 Lights Lo 14 V Lights Hi/28V Swap See Section 2.3.2.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix B Dual Interconnect Radio Wiring (all units) Com #1 T 3 C 16 E H S 5 J 15 F 9 R 6 K Com #2 Com #3 Com #4 Com #5 (Note 13) NAV 1 Com 1 Audio Hi Com 1 Lo Com 1 Mic Audio Hi Com 1 Mic Key NAV 2 MKR ADF DME (Note 17) UNSW 1 UNSW 2 T Com 1 Audio Hi Com 1 Lo 3 C Com 1 Mic Audio Hi Com 1 Mic Key 16 Com 2 Audio Hi Com 2 Audio Hi Com 2 Lo Com 2 Mic Audio Hi Com 2 Mic Key Com 2 Lo E
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PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 7.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 7.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix C- Instructions for FAA Form 337 and continuing airworthiness 8.1 Instructions for FAA Form 337, Audio Panels One method of airworthiness approval is through an FAA Form 337, Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance) In the case of the PAC24, you may use the following text as a guide.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix D – RTCA DO160D (EUROCAE ED-14) Environmental Qualification Form Audio Selector Panel/Intercom Part Number: 050-240-0XXX FAA TSO Number: C50c, Class A, Manufacturer: PS Engineering Incorporated 9800 Martel Road Lenoir City TN 37772 Conditions Temperature and Altitude Low Temperature High Temperature In-flight Loss of Cooling Altitude Decompression Overpressure Section 4.0 4.5.1 4.5.2 4.5.4 4.
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. There are three possible configurations ; you must select the case that best fits your installation. NOTE: Only the person who presses their PTT switch will be heard over the radio.
