9800 Martel Road Lenoir City, TN 37772 www.ps-engineering.com PAC24 Audio Control Panel and Intercom System Document P/N 200-240-0008 Revision 7 June 2003 Audio Control Panel Intercom System Installation and Operation Manual Patent No. 5,903,277 and 6,160,496 FAA-Approved TSO C50c JAA-Approved JTSO C50c 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 1.2 1.3 1.4 1.5 1.6 1.7 1.8 INTRODUCTION........................................................................................................... 1-1 SCOPE ............................................................................................................................. 1-1 EQUIPMENT DESCRIPTION ........................................................................
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.1 3.2 3.3 3.3.1 3.3.2 3.4 3.4.1 3.4.2 3.4.3 3.4.4 3.5 3.5.1 3.5.2 3.6 3.6.1 3.6.2 3.6.3 3.7 3.7.1 3.7.2 3.7.3 3.7.4 3.8 3.9 3.9.1 3.9.2 SCOPE ............................................................................................................................. 3-1 PAC24 CONTROLS...........................................................................................................
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 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 circuits, and only opens the specific microphone channel in use.
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 Ω 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: 250-240-0000 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 post-installation 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 4 3 2 1 4 3 2 1 S4 S3 4 3 2 1 4 3 2 1 S2 2.3.2.1 S5 Single/Dual configuration Switch S5 2 OFF 3 OFF Single PAC24 Installation ON OFF Pilot unit –Dual Installation Single System/Pilot ON ON Copilot Panel J4 ON (installed) J4 OFF (Removed) J5 Jumper Pins 1 & 2 J5 Jumper Pins 2 &3 200-240-0008 Copilot unit –Dual Installation Page 2-2 Rev.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Pin 1 J 5 2.3.2.2 J 4 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. Switch 2.3.2.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Switch 2.3.2.6 S2 1 ON 2 OFF OFF CVR Output ON IRS Playback Input 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.
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.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual cable clamp (625-001-0002). Secure the ground bar (430-630-0002), if desired using, #6-32 nuts (475-6320003) and #6-32 lock nuts (475-632-0004). 2.4 Cable Harness Wiring Referring to the appropriate Appendix, assemble a wiring harness as required for the installation. All wires must be MIL-SPEC in accordance with current regulations.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 2.4.2.2 Dual KMA24H -71 Installation In a dual KMA24H-71 installation, we recommend that the ISO/Normal/Private switches be removed. These switches apply a ground to logic inside the KMA24H. 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 PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual the back lighting system to work. The photocell mounted in the unit face will automatically adjust the intensity of the push-button annunciator LEDs. 2.4.9 Unswitched inputs J3, pin 10 is the unswitched input number 1 and J3 pin 14 is unswitched input 2. These inputs are presented to the pilot and copilot regardless of the audio configuration, and will always mute the entertainment inputs.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Caution: Local oscillators and internal signals from some entertainment equipment can cause undesired interference with other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any adverse effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch off the entertainment devices.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 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. Any antenna relocation must be accomplished in accordance with AC 43.
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) 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 3.6.2 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.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.7.2 Volume Control (3) The volume control is a concentric knob. The inner knob adjusts the loudness of the intercom for the pilot (in single panel installation) and the outer knob controls copilot and passenger volume. It has no effect on selected radio levels or music input levels.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 3.7.4.1 Music Off Music Off mode may be selected in cases where a music input is not connected, or in use, but audio noise can be heard due to other loads or cross-talk in the system. Music can be inhibited completely by pressing NAV1 and AUX for at least 3 seconds. Music Off will override karaoke mode 3.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual 200-240-0008 Page 3-7 Rev.
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- (or other ICAO agency) certified avionics shop and authorized PS Engineering dealer.
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 6.690 200-240-0008 Appendix A Rev.
200-240-0008 15 Com 4 Audio Hi P 13 12 L N Nav 1 Audio Hi NAV 1 Audio Lo Nav 2 Audio Hi Nav 2 Audio Lo Mkr Audio In Hi Mkr Audio In Lo ADF Audio Hi ADF Audio Lo DME Audio Hi DME Audio Lo VHF Nav 1 VHF Nav 2 Mkr Receiver ADF Receiver DME Receiver Appendix A 11-33 VDC 3A See Note 11 Airframe Ground 14 V Lights Hi/28V Swap Lights Lo 28 Volt Lights Hi/14V swap 23 Expansion Output See Note 7 22 Expansion Input Speaker Hi Pass. 3 Mic Jack Pass. 2 Mic Jack Pass.
PS Engineering PAC24 Series Audio Selector Panel and Intercom System Installation and Operator’s Manual Appendix B Dual Interconnect wiring Com #1 Com #4 Com #5 (Note 13) NAV 1 NAV 2 MKR ADF DME UNSW 1 UNSW 2 Com 1 Audio Hi Com 1 Lo Com 1 Lo 3 C Com 1 Mic Audio Hi Com 1 Mic Key Com 1 Mic Audio Hi Com 1 Mic Key 3 C 16 Com 2 Audio Hi Com 2 Audio Hi 16 Com 2 Lo Com 2 Lo Com 2 Mic Audio Hi Com 2 Mic Key Com 2 Mic Audio Hi Com 2 Mic Key Com 3 Audio Hi Com 3 Audio Hi 5 J 15 F 9 R Com 1
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.
