PS Engineering PMA7000B AUDIO PANEL Installation Manual
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9800 Martel Road
Lenoir City, TN 37772 www.ps-engineering.com
P M A 7 0 0 0 B
Document P/N 200-780-0005
Revision 12, April 2020
Audio Selector Panel with Marker Beacon Receiver
High-fidelity Stereo Intercom
System Installation and Operation Manual
FAA-Approved TSO C50c, C35d
JAA-Approved JTSO C50c, 2C35d
Patented under one or more of the following; No. 4,941,187; 5,903,277;
6,160,496 and 6,493,450
In certified aircraft, warranty is not valid unless this product is installed by an
Authorized PS Engineering dealer.
PS Engineering, Inc. 2020 ©
Copyright Notice
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS
Engineering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800
Martel Road, Lenoir City, TN 37772. Phone (865) 988-9800, email [email protected]
.
Table of Contents
PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
APPENDIX E- INSTRUCTIONS FOR FAA FORM 337 AND CONTINUING
APPENDIX F RTCA DO160C (EUROCAE ED-14) ENVIRONMENTAL QUALIFICATION
Revision History
Rev Date
1
2
3
Dec. 2002
May 2003
Dec 2003
4
5
6
7
March 2005
March 2005
Nov. 2007
January 2009
8
9
Feb 2010
May 2011
10 Dec 2012
11 Feb. 2015
12 April 2020
Change
Clarified the AirCell Guardian Interface, added patent number to cover
Removed confusing part numbers, added Option 2 (No marker)
Added cell phone interconnect, CNX80 interface, removed POTS interface. Added x-reference to KMA26 & GMA340
Clarify CNX80 interface, incompatible with Option 1
Added list of test equipment for marker beacon
Added note for Fail Safe Channel
Remove DRAWS ., Add ALT ICS Mode and switched to rubber buttons (S/N K4135 & up)
Added detail on Com 3 adjustment §2.7
Added detail on Unswitched inputs #3 & 4 when replacing a KMA24
Removed hook switch connection from AUX enable, §2.4.14
Changed number of connector pins in kit
Changed installation kit 44-pin connectors when parts went EOL
200-780-0005 Page ii Rev. 12, April 2020
PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Section I GENERAL INFORMATION
1.1 INTRODUCTION
The PMA7000B represents the next step in cockpit audio control and intercommunications utility. 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.
Before installing and/or using this product, please read this manual completely. This will ensure that you will take full advantage of all the advanced features in the PMA7000B.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PMA7000Bseries of Audio Selector Panel/Intercom Systems. This includes the following units:
Model
PMA7000B Option 3
Description Part Number
Stereo Audio Selector Panel with Marker Beacon 7000B- Opt. 3
1.3 EQUIPMENT DESCRIPTION
The PMA7000B-series is a state of the art audio isolation amplifier and audio selector that contains an automatic voice activated (VOX) intercom system. It can switch up to three transceivers (Com 1, Com 2 and
Com 3) and six receivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).
A duplex COM 3 mode (selectable at installation) allows the PMA7000B to act as an audio interface between aircraft headphone and microphones and specific aircraft approved (FAA/FCC) cellular telephone equipment.
Warning : Use of non-aviation approved cellular telephone equipment may be prohibited by regulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PMA7000B must be interfaced with an approved system.
There are four unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar altimeter warning.
Push buttons select the receiver audio source provided to the headphones. A SPR button allows the user to listen to the receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio is muted during transmit.
Push buttons select one of the communication transceivers for the pilot and copilot position, and allows radio transmission. In "Split Mode" the PMA7000B has the ability to allow the pilot and copilot to operate different transceivers independently. The Com 3/TEL mode (selected at installation) allows the pilot to use the audio panel for duplex operation, such as with specific cellular telephones. External switches permit telephone operation for the copilot and passengers.
A fail-safe mode connects the pilot headphone and microphone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail-safe) position. Unswitched input #1 is also connected to the pilot headset in Fail-safe mode.
A six-station voice activated (VOX) intercom is included in the PMA7000B. 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 microphone channel in use.
The intercom system incorporates pilot isolate and crew modes, two independent stereo music inputs with
"Soft Mute," and flashing LED indicators for transmit indications. Intercom control is through two front panel- mounted volume knobs and 3-position mode switch. The concentric volume controls the intercom level for the pilot and copilot, while the outer knob controls the passenger intercom volume. Intercom squelch is automatic.
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
An “Alternate Intercom Mode” is incorporated in PMA7000B beginning with a serial number starting with
“J”and above. This allows the passengers and crew to converse, but removes radio traffic from the passengers’ headphones, and blocks passenger mics from the crew during radio receptions.
A 3-light Marker Beacon receiver is integrated in the PMA7000B. This provides the necessary Marker
Beacon lights and audio indications necessary for an Instrument Landing System (ILS) approach.
1.4 APPROVAL BASIS -
TSO Approval .
The PMA7000B-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and
TSO C35d (Marker Beacon Receivers). In addition, they are approved by the Joint Airworthiness Authorities under JTSO C50C and JAR-TSO 2C35d.
All systems comply with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and ( Marker
Beacon Receivers ), ED-14C/DO-160C ( Environmental Conditions and Test Procedures for Airborne
Equipment ), ED12B/DO-178B ( Software Considerations for Airborne Equipment ) and ED- 18/DO-214
( Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio Systems ).
Operation is subject to the following conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.
1.5 SPECIFICATIONS
Marker Beacon :
Audio Selector/Intercom :
APPLICABLE DOCUMENTS:
TSO COMPLIANCE
C35d, Class A
C50c, Class A
RTCA/DO-214 RTCA/DO-143 RTCA/DO-160C
RTCA/DO-178B
ENVIRONMENTAL Qualifications :
Operating Temperature Range:
Altitude :
DIMENSIONS:
A1D1/CA(MN)XXXXXXBBBBTBKXX
-15º C to 55ºC
Up to 50,000 feet in an non-pressurized area
Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)
WEIGHT (With Rack & Connectors):
Depth: 6.8 in. (17.3 cm)
1.5 lb. (0.54 kg)
POWER REQUIREMENTS (Including Internal Lighting):
Voltage :
Maximum Current :
11 to 33 VDC
2.5 Amp (Externally protected by a 3A pull-type breaker)
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Audio Selector Specifications
Audio selector panel input impedance : 510
Input Isolation : -60 dB (min.)
-60 dB (min.) Speaker Muting :
Speaker Output (into 4
) with no clipping
14 VDC:
28 VDC:
3 Watts (min.)
10 Watts (min.)
Receiver Inputs : 9 (Com 1, Com 2, Com 3, Nav 1, Nav 2, ADF,
DME, MKR, AUX)
Unswitched Inputs :
Transmitter Selections :
Speaker Impedance :
Headphone Impedance :
4
5 (Com 1, Com 2, Com 3
Com1/2, Com1/3)
4
150 – 1000
Headphone Output :
Microphone Impedance :
38 mW each headset, no clipping <1% THD
150 - 600
Intercom Specifications
Intercom Positions
Music Inputs
Frequency
Sensitivity
Low:
High:
:
Selectivity :
:
:
Music Muting :
:
Distortion:
Mic Freq. Response, 3 dB:
Music Freq. Response, 3 dB :
6 places (with individual Intelli Vox® circuits)
2, (Independent, Stereo)
>-30 dB "Soft Mute" when Com or intercom active.
<1% THD @ 38 mW into 150
300 Hz - 6000 Hz
20 Hz - 18kHz
MARKER BEACON RECEIVER: (if equipped)
75 MHz Crystal Controlled
Capable of: (preset at factory for field application)
1000
Volts (Hard) (360 to 570
V soft)
200
Volts (Hard) (130 to 200
V soft)
External Lamp Output
MM Sense :
:
-6 dB at ±10 kHz
-40 dB at ±120 kHz
7.5 (±4 VDC unloaded, at maximum brightness) VDC positive when active, max. current 125 mA
Active high (4.5 ± 1.0VDC)
1.6 EQUIPMENT SUPPLIED
1 ea. of the following units:
Model
PMA7000B Opt 3
Description
PMA7000B Audio Panel with Marker Beacon and Stereo intercom.
PMA7000B Audio Panel without Marker receiver PMA7000B Opt 2
PMA7000B Installation Kit (250-007-5002):
Description
PMA7000 installation rack assembly
Top TE Connector Shell w/key, 44 pin, key 4/5
Bottom TE Connector Shell w/key, 44 pin, key 7/8
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
Part
Number
120-430-0420
120-425-4404
120-425-4403
425-001-5833
475-440-0007
430-007-0001
475-632-0038
475-632-0003
475-632-0004
625-001-0002
475-632-0012
Part Number
7000 (Opt 3 )
7000 Opt 2
Quantity
1
1
1
70
4
1
2
2
2
1
6
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Description
#6-32 Clip Nut
Parts identification sheet
Pilot’s Guide
Part
Number
475-630-0002
002-250-7028
202-070-0001
Quantity
6
1
1
NOTE:
The TE (AMP) 44-pin connectors: 120-425-4404, 120-425-4403 and pins 425-001-5833 are not interchangeable with previous version Molex, part numbers 120-425-4400 and 120-425-4402, pins 425-001-0002.
1.7
1.8
None
EQUIPMENT REQUIRED BUT NOT SUPPLIED a) Circuit Breaker: 1 ea; 3 amp PULL TYPE REQUIRED for PMA7000B b) Speaker, 4
c) Headphone Jacks (Stereo, as Required) d) Microphone Jacks (as Required) e) Headphones, 150
(Stereo), up to 6 as required f) Microphones, up to 6 as required g) Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed) h) Interconnect Wiring
LICENSE REQUIREMENTS
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PS Engineering
PMA7000B 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 interconnection instructions for the PS Engineering
PMA7000B-Series Audio Selector Panel/Intercom/ with internal Marker Beacon.
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.
2.1.2 Certification Requirements
NOTE
The PMA7000B requires specialized knowledge and tools for an effective installation.
An appropriately rated Certified Aircraft Repair Station must install this equipment in accordance with applicable regulations. PS Engineering, Incorporated warranty is not valid unless the equipment is installed by an authorized PS Engineering, Incorporated dealer.
Failure to follow any of the installation instructions, or installation by a non-certified individual or agency will void the warranty, and may result in an unairworthy installation.
2.2 Unpacking and Preliminary Inspection
Use care when unpacking the equipment. Inspect the units and parts supplied for visible signs of shipping damage. Examine the unit for loose or broken buttons, bent knobs, etc. Verify the correct quantity of components supplied with the list in Section 1.6 (B). If any claim is to be made, save the shipping material and contact the freight carrier. Do NOT return units damaged in shipping to PS Engineering. If the unit or accessories show any sign of external shipping damage, contact PS Engineering to arrange for a replacement.
Under no circumstances attempt to install a damaged unit in an aircraft. Equipment returned to PS Engineering for any other reason should be shipped in the original PS Engineering packaging, or other UPS approved packaging.
2.3 Equipment Installation Procedures
2.3.1 Cooling Requirements
Forced air-cooling of the PMA7000B is not required. However, the units should be kept away from heat producing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics) without adequate cooling air provided.
2.3.2 Mounting Requirements
The PMA7000B 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 43.13-2B. The unit may be mounted in any area where adequate clearance for the unit and associated wiring bundle exist.
Avoid installing the unit close to high current devices or systems with high-voltage pulse type outputs, such as DME or transponders. Avoid running the interconnecting bundles near any high current wires.
2.3.3 Audio Panel Mounting Rack Installation
Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in the center of the unit. Use caution to avoid hitting the photo-detector lens. Carefully slide the unit free of the tray. Set the unit aside in a safe location until needed. Install the tray using six clip nuts (475-630-0002), and six FHP
6-32 x ½" screws (475-632-0012). The audio selector panel must be supported at front and rear of the mounting tray.
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
2.3.4 Audio Panel Tray and Connector Assembly
The unit connectors mate directly with the circuit boards in the PMA7000B. The connectors are a Molex crimp-type, and require the use of a Molex hand crimp tool, EDP P/N 11-01-0203, CR6115B (or equiv.).
The connectors are mounted to the unit tray with #4-40 screws (475-440-0007), from the inside of the tray.
Ensure that proper strain relief and chafing precautions are made during wiring and installation, using the cable clamp (625-001-0002). Secure the ground bar (430-007-0001), if desired using, #6-32 nuts (475-632-
0003) and #6-32 lock nuts (475-632-0004).
120-430-0420
4404
( AR )
4403
Figure 2-1 Audio Panel Tray Assembly Drawing
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. Two- and three-conductor shielded wire must be used where indicated, and be MIL-C-27500 or equivalent specification. Proper stripping, shielding and soldering technique must be used at all times. It is imperative that correct wire be used.
Refer to FAA Advisory Circular 43.13-2B for more information. Failure to use correct techniques may result in improper operation, electrical noise or unit failure. Damage caused by improper installation will void the PS Engineering warranty.
2.4.1 Noise
Due to the variety and the high power of radio equipment often found in today's general aviation aircraft, there is a potential for both radiated and conducted noise interference.
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PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
The PMA7000B power supply is specifically designed to reduce conducted electrical noise on the aircraft power bus by at least 50dB. Although this is a large amount of attenuation, it may not eliminate all noise, particularly if the amplitude of noise is very high. There must be at least 13.8 VDC present at the bottom connector, pin 20, of the PMA7000B for the power supply to work in its designed regulation. Otherwise, it cannot 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 interference is possible. The PMA7000B was designed in a RFI hardened chassis and has internal Electromagnetic Interference (EMI) filters on all inputs and outputs.
Ground loop noise occurs when there are two or more ground paths for the same signal (i.e., airframe and ground return wire). Large cyclic loads such as strobes, inverters, etc., can inject noise signals onto the airframe that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a 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. Keep these cables physically separated. It is very important that you use insulated washers to isolate the ground return path from the airframe to all headphone and microphone jacks.
Adding a high-performance audio control system, particularly in conjunction with high-performance active noise canceling headsets, cannot improve on older avionics that were designed for cabin-speaker use. PS
Engineering makes no claim that the audio panel will provide a noise-free audio quality under all installation conditions, particularly with older avionics.
2.4.2 Existing KMA-24 Installation
If the installation replaces a KMA-24 (series -01, -02 or -03), the existing 44 pin connector can be used for the bottom connector of the PMA7000B tray as is, providing it is properly installed and wired. If the KMA
24 installation includes “External Speaker” or Internal Speaker” connections to J1 Pins X and U respectively), these will have to be disconnected to avoid interference with the Unswitched inputs #3 and #4.
No other changes are required except for external marker lights (see Section 3.7.2 for details). The "key" in the existing connector must be located between pins 7 and 8. This connector will be used in the bottom connector position. (See Appendix for complete wiring harness details.)
The existing ground bus may be reused for radio shield connections, if it was constructed so it can be relocated to the PMA7000B tray.
2.4.3 Existing PMA6000 installations
In 28-Volt aircraft, the dropping resistor may be removed, however, the 2 Amp breaker should be changed to 3 Amp. If the old unit is stereo (PMA6000S or PMA6000MS), no rewiring is necessary except to add additional features.
2.4.3.1 Stereo PMA7000B installations into monaural PMA6000, PMA6000M.
Installations replacing PMA6000 or PMA6000M require re-wiring of the top connector to accommodate the stereo configuration. See appendixes for detailed interconnect information.
2.4.4 Power
The PMA7000B-Series are compatible with both 14 and 28 Volt DC systems. A two (2) Amp circuit breaker is required for 14 VDC installations, and a three (3) Amp breaker for 28 VDC aircraft. Power and ground wires must be a twisted #18 AWG pair. Connect airframe power ground to J1 (bottom connector)
Pin Z only. No dropping resistors are required.
2.4.5 Communications Push-to-Talk
An important part of the installation is the PTT (Push-To-Talk) switches that allow the use of your aircraft communications radio for transmissions. There are three typical configurations that can be used. Select the case that best fits the installation. Only the person who presses their PTT switch will be heard over the ra-
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual dio. If the pilot and copilot both use the PTT, the only pilot position has access to the radio. The pilot position will have PTT control regardless of the mic selector switch or copilot PTT when the PMA7000B is in the OFF /E MG mode.
CASE I : PTT is built into both pilot and copilot yokes.
CASE II: PTT is in pilot yoke only. This configuration requires a modified external PTT switch plugged into the copilot's microphone jack. (See Appendix A). When the copilot's PTT is pressed, the intercom switches the microphone audio from pilot to copilot mic.
CASE III : No built in PTT. This requires two built in PTTs to be installed, or modified external PTT switches to be used. Modify external PTT as required. See Appendix A.
2.4.6 Audio Panel interface
The PMA7000B 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.
Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the system. For best results, connect the audio low from the audio panel to the radio ground, using one conductor of the twisted-shielded cable.
2.4.6.1 Speaker Load
The PMA7000-series contains a speaker amplifier. Some units with internal speaker amplifiers, such as the
King Radio KX170-series, require a resistive load to prevent damage if their speaker amplifier is not used.
Connect the speaker output from the unit to the load input on the PMA7000B (J1, pins 19 and L, 16 and M.
The speaker load is 16
, 3W.
2.4.6.2 Fail Safe Connection
The PMA7000B connects the pilot microphone and headphone directly to COM 1 input when power is removed. The headphone failsafe is the RIGHT channel, connected to the TIP of the headphone jack, to be compatible with monaural headphones. Unswitched input #1 (Bottom Connector pin T) is also provided to the pilot headset, right channel, in fail-safe.
NOTE: The pilot headphone MUST be wired in accordance with Appendix C, Bottom connector Pin 3 to
Pilot headphone tip (right) to ensure proper failsafe operation. Verify failsafe operation in accordance with
Section 2.11.2, step 3.
2.4.7 Com 3 Duplex (TEL) Function for Cell Phones
As installed in the standard configuration, the PMA7000B Com 3 function operates conventionally. Pushing the Com 3 Xmt button places the receive audio from Com 3 in the headset and applies the pilot or copilot microphone to the Com 3 when the appropriate PTT is activated.
If J2, Pin J is connected to aircraft ground, the PMA7000B is forced into Com 3-Duplex mode. Copilot and passenger audio as selected by hook switches are provided to the COM 3 output, the PTT for Com 3 is inactive, and audio from Com 3 is presented to the headset. This allows a telephone-like audio interface.
In this mode, the COM 3 input and output is compatible with many cellular telephones utilizing the handsfree headset interface. A 1/8" or 3/32" jack can be installed on the aircraft panel, which is interfaced with the PMA7000B as shown below. To connect the cellular telephone to the jack wired in to COM 3, a patch cord is required. This patch cord is available from PS Engineering under P/N 425-006-7026 (3/32" to
3/32"). A 1/8” to 3/32” adapter cable is P/N 425-006-2535.
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M M m
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C
C
A
A
3 n p u o 3 u d o u d o L o
3 3 2 e u a a c
J c k " r
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
7000B
Bottom Connecto r
Cellular Plug (ty pical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground
Cellular Phone
Interconnect
J
K
1
For Duplex (cell phone) operation
Pin J of top connector MUST BE GROUNDED
This is a typical interconnect
PS Engineering does not guarantee compatability in all cases.
Figure 2-2 Cellular telephone interface
Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement action, which may include a $10,000 fine per incident.
FCC Regulation 47 CFR § 22.925 Prohibition on airborne operation of cellular telephones.
Cellular telephones installed in or carried aboard airplanes, balloons or any other type of aircraft must not be operated while such aircraft are airborne (not touching the ground). When any aircraft leaves the ground, all cellular telephones on board that aircraft must be turned off.
PS Engineering, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes no responsibility for the user’s action.
2.4.8 Transmit Interlock
Some communications transceivers use a transmit-interlock system. To fully utilize the Split Mode feature, this function must be disabled. Consult that manufacturer's installation manual.
2.4.9 "Swap" Mode
When a momentary, normally open, push-button switch is connected between pin 10 on the top connector and aircraft ground, the user can switch between Com 1 and 2 by depressing this switch without having to turn the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from the yoke to change transceivers. The transfer of TX indication from Com 1 to Com 2 shows that the swap has been initiated, there is no dedicated swap indicator.
2.4.10 Backlighting
The PMA7000B has an automatic dimming of the pushbutton annunciator LEDs and marker lamps controlled by a photocell. Control of the unit backlighting is through the aircraft avionics dimmer. Connect the dimmer control line to J1 pin D for 14 volt systems, and to J1 pin F for 28 volt systems. Pin E is light ground.
If an external dimmer control is not used, a constant low level back light illumination can be established for nighttime viewing. Pin D or F (depending on system voltage) must be tied to power (J1, pin 20) for the back lighting system to work. The photocell mounted in the unit face will automatically adjust the intensity of the push-button annunciator LEDs.
2.4.11 Unswitched inputs
J1, pins T, 17, U and X are unswitched, unmuted inputs. These inputs are presented to the pilot and copilot regardless of the audio configuration, and will always mute the entertainment inputs. These 510 Ω inputs can be used for altimeter DH audio, GPS waypoint audio, autopilot disconnect tones, or any other critical audio signal. J1Pin T is provided to the pilot’s headset even when the unit is off, or in fail-safe mode.
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PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
If the KMA 24 installation includes “External Speaker” or “Internal Speaker” connections to J1 Pins X and
U respectively), these will have to be disconnected to avoid interference with the Unswitched inputs #3 and
#4.
NOTE: Inputs 1, 2 and 4 are fixed (1:1), and any audio level adjustments must be made at the input source.
Input 3 (Bottom Connector pin U) has adjustable attenuation.
2.4.12 PA Mute (J1, Pin 18)
Pin 18 of J1 is a TTL logic output that is pulled low during PTT operation. This serves as an input to external public address system to prevent feedback during transmissions.
2.4.13 Public Address Function (J2, Pin 18)
By connecting the top connector (J2), Pin 18 to ground, the pilot’s microphone audio is placed on the cabin speaker output. When the pilot’s PTT is activated, his voice is heard over the speaker. The copilot can continue to use the selected com.
We recommend installing a toggle switch to connect the cabin speaker output (pin W, bottom connector) to a rear or public address speaker instead of the cockpit speaker close to the pilot. This will prevent feedback.
2.4.14 Control Output (J2, Pin A)
Pin A of the top connector is pulled to ground whenever the AUX button is depressed. This serves as a control line for external devices, such as a entertainment system that the pilot wishes to control.
This could be used in conjunction with a PA to control J2, Pin 18, as well as an external relay to change to the cabin speaker from the cockpit.
This pin can also be used to control passenger Karaoke Mode, by connecting to pin V of the J2.
2.4.15 Intercom wiring
The top connector (J2) is for the intercom and additional functions. See Appendix 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.
2.4.15.1 Alternate Intercom Mode (Bottom connector Pin 14)
(Units with serial number beginning with (“J” or above)
If an external switch is installed between pin 14 of the bottom connector and ground, the PMA7000B can be placed into “Alternate Intercom Mode.” In this mode, when the ICS is in “ALL” mode, the passengers will not hear aircraft radio. In addition, the passengers’ microphones are not heard by the crew when the radios are active.
2.4.16 Entertainment Input
The PMA7000B has two INDEPENDENT music inputs. Entertainment input number 1 is J2 pins 15 (left channel) and 16 (right channel), WRT pin T, and is provided to the pilot and copilot. Entertainment number
2 is provided to the passengers at all times.
Entertainment 1 and 2 must be connected together in order for all positions to hear the same music source.
We recommend installing a DPDT switch to allow isolation of the music sources if desired.
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PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
16
15
T
Ent. #1 Input
14
13
R
Ent. #2 Input
Alternate Music Interconnect
N O T E : U s e t h e l o w l e v e l o u t p u t o f a n y a d d i t i o n a l e n t e r t a i n m e n t d e v i c e t o c o n n e c t t o t h e a u d i o p a n e l . M a x i m u m s i g n a l l e v e l i s 2 V A C p - p . D O N O T u s e a s p e a k e r - l e v e l o u t p u t , t h i s w i l l c a u s e i n t e r n a l d a m a g e i n t h e a u d i o p a n e l .
2.4.16.1.1 Entertainment muting
The PMA7000B-system incorporates a "Soft Mute" system. This will mute the entertainment devices during ICS or radio conversation.
Any signal appearing in the unswitched audio inputs will always mute the entertainment sources, even though the passengers may not hear the audio tone itself.
Caution: Local oscillators and internal signals from 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.
All additional entertainment devices must be switched off for both takeoff and landing.
2.4.16.1.2 Entertainment 2 Mute (Pin V)
The ICS button on the PMA7000B controls the muting (“Karaoke mode”) of entertainment source #1.
Connecting J2 pin V to ground through a SPST switch places the entertainment #2 music source into the
Karaoke Mode. In this mode, incoming music and intercom conversation will not mute the music for the passengers’ intercom net. This allows uninterrupted music during casual conversation and at times when radio communications are of lesser importance.
See section 2.4.14 for alternative connection.
2.4.17 PMA7000B Intercom expansion (J2, Pins P, S, and C)
The PMA7000B contains a 6-place intercom. In applications where more intercom positions are needed, PS
Engineering can provide intercom expansion units, such as the IntelliPAX, part number 11606, 11606R, etc. These can add up to six additional stereo intercom stations, plus independent music input. Interface to the expansion unit is through J2, pins P (audio input from expansion unit), S (audio output to expansion unit) and C (9 VDC expansion power).
2.5 Marker Beacon Installation
The marker beacon receiver is an option included in the PMA7000B. Non-marker (PMA7000) units can provide audio interface with the external receiver (see section 2.5.4).
2.5.1 Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included). Refer to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2A (or later revision),
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Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna must be mounted on the bottom of the aircraft.
2.5.2 External Marker Lights (Marker version)
For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt lamps only. The external output lamps are driven high (typically +9 VDC
1.5 VDC unloaded, at MAX brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell dimming.
2.5.3 Middle Marker Sense (Marker version)
A Middle Marker Sense output signal is available from the 7000B to flight control systems. This function will not operate during the test mode. This output will go to +4.5 VDC (
1.0 VDC) when a valid Middle
Marker signal is received. This output is J1, pin 2.
2.5.4 Marker Audio Input (non-marker version)
If using an external marker receiver, the audio input is J1, pin 21 (MKR input).
2.6 Adjustments
The PMA7000B is factory adjusted to accommodate the typical requirements for most aircraft configurations. There are five adjustments however, that will allow the installer to tailor the specific functions.
Unswitched input #3 can be attenuated by adjusting VR1 accessible through the bottom of the bottom board under the black antistatic cover, and labeled “unsw aud.”
COM 3 volume (for cellular phone volume) is adjusted with VR73, located on the bottom board, but accessible through the top board.
The unit will have to be removed from the tray to make these adjustments.
Com 3
Volume
Speaker
Volume
Marker
Volume
Marker Gain-
HI
Marker
Gain LO
Figure 2-3- PMA7000B Adjustments
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Communications Antenna Installation Notes
For best results while in Split Mode, it is recommended 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 43.13-2A, aircraft manufacturers’ recommendations and FAA-approved technical data.
Warning :
It is probable that radio interference will occur in the split mode when the frequencies of the two aircraft radios are adjacent, and/or the antennas are physically close together. PS Engineering makes no expressed or implied warranties regarding the suitability of the PMA7000B in Split Mode.
2.7.1 Telephone Hook Switches
While the Com 3 button acts as the hook switch for the pilot, additional hook switches must be installed to have full access to the cell phone system. The copilot hook switch is a SPST switch that connects pin L of
J2 on the PMA7000B to ground to place the copilot mic audio on the Com 3 audio in duplex mode for cell phone operation.
PMA7000B J2, pin M is the passenger hook switch. Install a SPST switch in a location adjacent to each passenger headset where cell phone use is desired. When pin M is connected to ground through any switch, the passenger microphones are all on the Com 3/duplex system.
The hook switches are not active or required unless the audio panel is in Com 3 /Duplex mode, with pin J,
J2 grounded.
The wireless communication “tel” system utilizes an intercom loop. Therefore, any time the cell phone is in use from the pilot or copilot side, pilot and copilot will lose intercom capability. In the ALL mode, when the passengers’ activate the cell phone, the pilots will have intercom, and continue to hear and transmit over the avionics normally. However the passengers will not have intercom, because they are on the telephone.
See section 2.4.14 for alternative connection for the hook switches.
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2.8 PMA7000B Pin assignments
Chassis Ground
MKR Coax Shield
MM Sense Output
MKR Antenna
Pilot Headphones (rt)
White Lamp Output
Amber Lamp Out
14 V Light Hi
Blue Lamp Out
Light Lo
DME Audio Hi
28V Lights Hi
Com 2 Mic Audio Hi
Pilot Mic Audio Hi In
Com 3 Audio Hi
Com 1 Audio Hi
Com 3 Mic Audio Hi
Com 2 Audio Hi
Com 1 Spkr Load
AUX Audio Input Hi
Com 2 SPKR Load
Nav 1 Audio Hi
Nav 2 Audio Hi
Com 1 Mic Audio Hi
Alternate ICS Mode
Com 1 Mic Key
Com 3 Mic Key
ADF Audio Hi
Com 2 SPKR load
Unsw itched Audio In #1
Unsw itched Audio In #2
Unsw itched Audio In #3
PA Mute
Com 2 Mic Key
Com 1 SPKR load
Cabin Spkr Out
Aircraft Pow er 11-33 VDC
Unsw itched Audio In #4
Ext. Marker Audio Hi
Pilot Mic PTT
Cabin Spkr Lo
Aircraft Ground
J1 Bottom Connector
P
14
R
15
S
16
T
11
M
12
N
13
9
K
10
L
H
8
J
E
6
F
7
3
C
4
D
5
1
A
2
B
19
W
20
X
21
17
U
18
V
Y
22
Z
J2 Top Connector
P
14
R
15
M
12
N
13
K
10
L
11
J
9
H
8
5
E
6
F
7
3
C
4
D
1
A
2
B
20
X
21
Y
22
Z
U
18
V
19
W
S
16
T
17
Input
Output
Pilot Phone Audio Hi (Left)
AUX Control Out
Copilot Phone Audio (Lt)
Copilot Phone Audio Lo
Copilot Phone Audio (Rt)
Expansion Pow er Out
Pass 1 Mic Audio Hi
Pass 1 Mic Audio Lo
Pass 2 Mic Audio Hi
Pass 2 Mic Audio Lo
Pass 3 Mic Audio Hi
Pass 3 Mic Audio Lo
Pass 4 Mic Audio Hi
Pass 4 Mic Audio Lo
Copilot Mic Audio Hi
Duplex Enable
Copilot Mic PTT
Copilot Mic Audio Lo
Swap Switch
Copilot Cellphone Off Hook
Passenger Headphone Audio (R)
Pass Cellphone Off Hook
Passenger Audio (L)
Passenger Headphone Audio Lo
Entertainment #2 in (R)
Expansion Input
Entertainment #2 In (L)
Ent. # 2 Low
Entertainment #1 In (R)
Expansion Output
Entertainment #1 Input (L)
Ent. #1 Input Lo
Ground
No Connection
PA Activate
Mute 2
No Connection
No Connection
No Connection
No Connection
No Connection
No Connection
No Connection
No Connection
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Post Installation Checkout 2.9
After wiring is complete, verify power is ONLY on pin 20 of the J1 (bottom connector), and airframe ground on bottom connector pin Z. Failure to do so will cause serious internal damage and void PS Engineering's warranty.
2.10 Unit Installation
To install the PMA7000B, 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. DO NOT OVER TIGHTEN.
W a r n i n g : D o n o t o v e r - t i g h t e n t h e l o c k d o w n s c r e w w h i l e i n s t a l l i n g t h e u n i t i n t r a y .
Internal damage will result.
2.10.1 Required Test Equipment
In order to return an aircraft to service after installation of the PMA7000, the installer must have access to a
Marker Beacon signal generator: a.
b.
IFR NAV401L, NAV402AP, IFR4000
TIC T-30D, T-36C
Equivalent test equipment is acceptable as long as the testing requirements can be met.
2.10.2 Operational Checkout
NOTE: The IntelliVox ® is designed for ambient noise levels of 80 dB or above. Therefore some clipping may occur in a quiet cabin, such as without the engine running, in a hangar. This is normal .
1.
Apply power to the aircraft and avionics.
2.
Plug headsets into the pilot, copilot, and occupied passenger positions.
3.
Verify fail-safe operation by receiving and transmitting on com 1 from the pilot position, with the audio panel power off. The Com audio will be present in the right ear cup only.
4.
Switch on the unit by pressing the volume (VOL) knob.
5.
Check intercom operation.
6.
Push the Com 1 Xmt select button (lower row).
7.
Verify that both of the Com 1 buttons light. Verify that transmit button LED (Light Emitting Diode) near the mic selector is not blinking. If the LED is blinking, stop testing and troubleshoot the microphone PTT installation.
8.
Verify proper transmit and receive operation from the copilot position, noting that the copilot PTT switch allows proper transmission on the selected transceiver. Verify that the Com 1 Xmt button blinks when transmitting.
9.
Verify that pushing the C OM 2 button causes the button to illuminate, and the Com 2 receiver to be heard. Verify operation on Com 1 from the pilot position.
10.
Repeat for Com 2 and standard Com 3, (if installed).
11.
Press and hold the Com 1 Xmt button. While holding the Com 1 button, press the Com 2 Xmt button.
This places the unit in “split Mode;” Verify that the pilot can transmit and receive on Com 1, while the copilot transmits and receives on Com 2.
12.
If the audio panel is installed with J2, pin J grounded, it is configured for duplex operation on Com 3.
Verify that the pilot headset is connected to the cellular telephone system (if installed). Verify that by using the pilot side PTT, the pilot can transmit on the other selected radio (Com 1 or Com 2). Verify that the Com 3 Xmt LED blinks at about twice the rate of com 1, to indicate a duplex mode. The copilot has radio transmit capability in Com3 duplex mode, on the selected Com ( 1 or 2). However, he will have Com 3 capability if the copilot hook switch is grounded.
13.
Verify proper operation of all receiver sources by selecting them using the appropriate button. The button illuminates to show which source is in use.
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14.
Push the SPR button. Verify that all selected audio is heard in the cockpit speaker. Verify that the audio mutes when the mic is keyed.
15.
Verify that the appropriate LED in the lower right side blinks when either push to talk is keyed.
16.
Verify proper Intercom system operation in the A LL , I SO and C REW modes (see Table 3-1).
17.
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.
2.10.2.1 Marker Checkout
1.
Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensitivity, verify that a 160
V, modulated 95% with 1300 Hz, signal will illuminate the amber (M) marker light, and that marker audio is present in the headphones when the Marker Audio (M) push-button has been depressed. Select SPR for speaker to verify marker audio availability on the cabin speaker. Verify that the white (I) and blue (O) lights will illuminate within
3dB of the amber lamp, with 3000 HZ and 400 Hz applied, respectively.
2.
Repeat with the unit in LOW sensitivity, with 430
Volts applied.
3.
Connect the marker antenna and verify proper operation.
2.10.3 Receiver Sensitivity
Although the receiver meets FAA TSO-C35d sensitivity specifications, the sensitivity has been adjusted to meet real world requirements (150
V and 430
V, soft). This will usually eliminate the need for the avionics shop to reduce the sensitivity in the field so as to prevent early detection of the marker beacons. If your particular installation requires more or less sensitivity, see adjustment section 2.6, and figure 2-1.
2.11 Cellular Interface Checkout
When a wireless telecommunication system is installed and the unit configured for duplex, a dial tone will appear in the headset of the pilot when the COM 3 Xmt selector activated. In “ALL” intercom mode, a dial tone will be heard whenever the copilot or passenger’s hook switch is closed.
2.12 Final Inspection
Verify that the wiring is bundled away from all controls and no part of the installation interferes with aircraft control operation. Move all controls through their full range while examining the installation to see that no mechanical interference exists. Verify that the cables are secured to the aircraft structure in accordance with good practices, with adequate strain relief. Ensure that there are no kinks or sharp bends in the cables and coaxial cables. Verify that the cables are not exposed to any sharp edges or rough surfaces, and that all contact points are protected from abrasion.
Complete logbook entry, and other documentation as required such as FAA Form 337, weight and balance computation. Sample text for FAA Form 337, and instructions for continuing airworthiness can be found in
Appendix F.
Return completed warranty registration application to PS Engineering, or register online at www.psengineering.com/support.shtml .
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Section III OPERATION
GENERAL INFORMATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA7000B, 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 four sections covering the basic operating areas of the PMA7000B systems.
They are Audio Selector, Transceiver Selection, Intercom, and Marker Beacon Receiver (Marker version only).
MARKER INDICATOR LAMPS
RECEIVE AUDIO SELECTORS
MARKER MODE
IINTERCOM MODE
CREW ICS VOLUME (INNER)
PASS ICS VOLUME (OUTER)
Figure 3-1 PMA7000B controls
TRANSMIT SELECTORS
CREW ICS
MUSIC MUTE
CONTROL
SPEAKER CONTROL
3.2 Power Switch (EMG-Fail Safe Operation)
Unit power is turned on and off by pushing the volume knob. In the OFF or " EMG " position, the pilot is connected directly to Com 1. This allows communication capability regardless of unit condition. Any time power is removed or turned OFF , the audio selector will be placed in the fail-safe mode.
The power switch also controls the audio selector panel functions, intercom and marker beacon receiver.
3.3 Microphone (XMT) Selection (All models)
There are six pushbuttons associated with the communications transceivers. The lower buttons control which transceiver is selected for transmit.
The PMA7000B 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.
The PMA7000B-Series has an automatic selector mode. Audio from the selected transceiver is automatically heard in the headsets and speaker (if selected). You can check this function by switching from C OM 1 to
C OM 2 and watch the selected audio light on the selector change from COM 1 to COM 2. This ensures the pilot will always hear the audio from the transceiver he is transmitting on.
When switching from C OM 1 to C OM 2, while C OM 2 audio had been selected, Com 1 audio will continue to be heard. This eliminates the pilot having to switch Com 1 audio back on, if desired.
When switching from C OM 1 to C OM 2 while Com 2 has NOT been selected, Com 1 audio will be switched off. In essence, switching the mic selector will not effect the selection of Com receiver audio.
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Installation and Operator’s Manual
When the duplex enable, or TELEPHONE mode is implemented during installation, Com 3 becomes the
“TEL” position. This is the pilot’s “hook” switch, when the system is interfaced to an appropriate approved wireless telecommunication system, such as the AirCell system. Selecting Com 3 for transmit places the pilot microphone and headphones on the cellphone. The pilot PTT will switch the pilot mic to the other selected com transceiver, and allow continued aircraft communications to continue.
The copilot will also be able to transmit on the other selected radio with his PTT as well.
NOTE: Placing the mic selector switch in the COM 3 –TEL– mode will disable pilot and copilot intercom, as the intercom circuit is transferred to the telephone use. In crew or ISO mode, placing the switch in TEL mode removes the passengers access to the telephone.
3.3.1 Swap Mode (Switch from Com 1 to Com 2 remotely)
With a yoke mounted, momentary switch, the pilot can change from the current Com transceiver to the other by depressing this switch. To cancel "Swap Mode," the pilot may either press the yoke mounted switch again, or select a different Com with the XMT buttons. .
3.4 Audio Selector (All models)
Receiver audio is selected through seven momentary, push-button, backlit switches. You will always hear the audio from the transceiver that is selected for transmit.
The users can identify which receivers are selected by noting which of the green switch LEDs are illuminated. Push buttons labeled Nav 1 , Nav 2 , MKR (Marker), ADF , DME, AUX (auxiliary), and SPR
(Speaker) are "momentary type switches. When one of these buttons is pressed, be active, and the LED will illuminate. Press the switch again and it be in the "off" position and remove that receiver from the audio.
3.4.1 Speaker Amplifier
The " SPR " in the push-button section stands for speaker. This switch will place all selected audio on the cockpit speaker when this switch is selected. NOTE: Except for the unswitched audio, the speaker amplifier is not active in the "Split Mode."
Unswitched audio, (autopilot disconnect, altimeter warning, etc.) will come through the speaker regardless of the speaker button position.
3.4.1.1 Public Address Function
To access PA function, a switch is installed to connect the top connector, pin 18, to ground. This places the pilot microphone on the speaker output (Pin W) when the PTT is pushed. The copilot can continue to use the selected com radio.
We recommend that the switch transfer the audio from the cockpit speaker to a cabin speaker for public address. This will prevent feedback.
3.5 Split Mode
The split mode can be activated at any time by pressing the desired combination of XMT buttons. For instance, to activate a Com 1/Com 2 split, press and hold the Com 1 button, and then press the Com 2 button while holding the Com 1 button. This places the pilot on Com 1 and the Copilot on Com 2.
Split mode for Com 3 is possible with pilot on Com 1, copilot on Com 2 or 3, if telephone is not enabled.
Pilot on Com 2 or Com 3 and Copilot on Com 1 is not possible.
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Note
:
Due to the nature of VHF communications signals, and the size constraints in general aviation aircraft, it is probable that there will be some bleed-over in the
Split mode, particularly on adjacent frequencies.
PS Engineering makes no warranty about the suitability of Split Mode in all aircraft conditions.
Note : Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot . However, the copilot will only hear the selected communications receiver.
3.5.1 Split Mode ICS
In split mode, the pilot and copilot are usually isolated from each other on the intercom, simultaneously using their respective radios. Depressing the ICS button in Split Mode will activate VOX intercom between the pilot and copilot positions. This permits intercommunication when desired between the crew. Pressing the ICS button again disables this crew intercom function.
3.6 Intercom Operation
3.6.1 IntelliVox® VOX-Squelch
No adjustment of the IntelliVox ® squelch control is necessary. There is no field adjustment. Through three individual signal processors, the ambient noise appearing in all six microphones is constantly being sampled. Non-voice signals are blocked. When someone speaks, only their microphone circuit opens, placing their voice on the intercom.
The system is designed to block continuous tones, therefore people humming or whistling in monotone may be blocked after a few moments.
For consistent performance, any headset microphone must be placed within ¼-inch of your lips, preferably against them. (ref: RTCA/DO-214, 1.3.1.1 (a )).
It is also a good idea to keep the microphone out of a direct wind path. Moving your head through a vent air stream may cause the IntelliVox ® to open momentarily. This is normal.
The IntelliVox ® is designed to work with normal aircraft cabin noise levels (70 dB and above). It loves airplane noise! Therefore, it may not recognize speech and clip syllables in a quiet cabin, such as in the hangar, or without the engine running. This is normal.
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.
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Installation and Operator’s Manual
Table 3-1 Mic Muff ™ Part Numbers
Manufacturer
Bose
David Clark
Lightspeed
Peltor
Model
Dynamic
Electret
M87 Dynamic
H10-30
H10-20, H10-40
H10-13.4
15K & 20K
7003
7004
Mic Muff™ Part Number
90010
90015
90020
90010
90015
90015
90015
90010
90015
Pilot 11-20 & 11-90 90015
Sennheiser
Telex Airman 750
AIR3000
90015
90015
90010
3.6.2 Intercom Volume Control
The inner volume control knob adjusts the loudness of the intercom for the pilot and copilot. It has no effect on selected radio levels, music input levels or passengers' volume level.
The outer volume control knob controls intercom volume or the passengers. It has no effect on radio or music levels.
Adjust the radios and intercom volume for a comfortable listening level. Most general aviation headsets today have built-in volume controls; therefore, volume also can be further adjusted at the individual headset.
3.6.2.1 Mono headsets in Stereo Installation
All passenger headsets are connected in parallel. Therefore, if a monaural headset is plugged in to a
PMA7000B Stereo installation, one channel will be shorted. Although no damage to the unit will occur, all passengers will lose one channel, unless they switch to the “MONO” mode on the headset. PS Engineering modifies headsets to add stereo capability, using high-fidelity speakers. Contact factory for details.
3.6.3 Intercom Modes
The lower switch on the left side is a 3-position mode switch that allows the pilot to tailor the intercom function to best meet the current cockpit situation. The description of the intercom mode function is valid only when the unit is not in the "Split" mode. Then, the pilot and copilot intercom is controlled with the
ICS button.
I SO : (Up Position): The pilot is isolated from the intercom and is connected only to the aircraft radio system. He will hear the aircraft radio reception (and sidetone during radio transmissions). Copilot will hear passengers’ intercom and Entertainment 1, while passengers will hear copilot intercom and Entertainment
2. Neither will hear aircraft radio receptions or pilot transmissions.
A LL : (Middle Position): All parties will hear the aircraft radio and intercom. Crew will hear Entertainment
1, passengers will hear Entertainment 2. During any radio or intercom communications, the music volume automatically decreases. The music volume increases gradually back to the original level after communications have been completed.
C REW (Down Position): Pilot and copilot are connected on one intercom channel and have exclusive access to the aircraft radios. They may also listen to Entertainment 1. Passengers can continue to communicate with themselves without interrupting the Crew and also may listen to Entertainment 2.
Anytime the PMA7000B is in either the C OM 1/C OM 2, C OM 1/C OM 3 ("Split Mode"), the pilot and copilot intercom is controlled with the ICS button. The passengers will maintain intercommunications, but not hear aircraft radios.
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3.6.3.1 Alternate Intercom Mode
If an external switch is installed, the PMA7000B can be placed into “Alternate Intercom Mode.” In this mode, the passengers will not hear aircraft radio in the ALL intercom mode. In addition, the passengers’ microphones are not heard by the crew when the radios are active. (Available in serial numbers starting with “J” or later)
3.6.4 Entertainment Input
The audio selector panel has provisions for two separate entertainment input devices. Music 1 feeds the pilot and copilot positions. They operate independently in the PMA7000B. The volume control does not affect the music level.
While in the ISO (Isolate) mode, the copilot will hear Entertainment 1 while the four passengers will hear
Entertainment #2. In normal operation, whenever a person speaks, or if the aircraft radio becomes active, the music will automatically mute and then will gradually return to the original listening level when the intercom or radio conversation ceases.
When in the A LL mode, pilot and copilot will hear Entertainment 1 input while all passengers will hear the
Entertainment 2 source. While in the C REW mode, pilot and copilot will hear entertainment input #1 while the passengers may listen to entertainment input #2.
3.6.4.1 Soft Mute and Soft Mute inhibit
The Soft Mute feature assures that the aircraft radio transmissions will not be missed due to entertainment playing. When there is radio reception or intercom conversation, the music level is dropped to a low, or background level. When the radio or intercom traffic ceases, the level gradually returns to normal.
The front panel ICS switch controls muting of entertainment source #1 (for pilot and copilot). Pushing this button places the ICS in Karaoke (or sing along) mode, which inhibits the soft mute feature. This allows the music to continue uninterrupted by intercom or radio traffic when cockpit workload is appropriate. Pushing the button again will release the mute inhibit function.
The passenger music, source #2, can be placed in the Karaoke mode if a remote switch is installed in the aircraft. See wiring information for details.
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All
Crew
Table 3-2 Intercom Modes
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Mode Pilot Hears
Isolate A/C Radios
Pilot Sidetone
(during radio transmission)
Entertainment 1 is
Muted
Pilot
Copilot
A/C Radio
Passengers
Entertainment #1
Pilot
Copilot
A/C Radio
Entertainment #1
Copilot Hears
Copilot and passenger intercom
Entertainment #1
Copilot
Pilot
A/C Radio
Passengers
Entertainment #1
Copilot
Pilot
A/C Radio
Entertainment #1
Passenger Hears
Passenger and Copilot intercom
Entertainment #2
Passengers
Pilot
Copilot
A/C Radio
Entertainment #2
Passengers
Entertainment #2
Telephone
“Phone Booth” mode
Pilot has exclusive use of the telephone.
In TEL, Pilot & Copilot connected to Com 1 for PTT TX and receive. Others hear Tel if off hook.
All have access to phone through Hook Switch. Pilot access through TEL switch.
All hear telephone audio if off hook.
Pilot and copilot don’t have phone access, unless mic sel in TEL. Passengers have phone through Hook
Switch, Passengers hear phone audio.
Comments
This mode allows the pilot to communicate without the others bothered by the conversations. Copilot and passengers can continue to communicate and listen to music
This mode allows all on board to hear radio reception as well as communicate on the intercom. Music and intercom is muted during intercom and radio communications
This mode allows the pilot and copilot to concentrate on flying, while the passengers can communicate amongst themselves.
3.7 Telephone Mode
The Com 3 mode can serve as a full duplex interface for telephone systems such as AirCell or portable cellular phones with earpiece jacks, if the installation is correctly configured. When interfaced with an approved airborne telecommunications system, the PMA7000B can serve as a audio control and distribution center. Each intercom position has a "hook switch." The pilot's hook switch is the "Com 3" button on the audio panel, the others are discrete switches mounted adjacent to the headset jacks. When Com 3 is active in the duplex mode, the TX button will blink about twice as fast as the normal transmit rate.
When the intercom is in ALL mode, the pilot can speak on the phone only if the Com 3 is selected for transmit (Com 3 Xmt button activated). If any passenger places his or her switch into the “off-hook” position all passengers will also be heard on the phone. All will hear selected audio. Com 1 audio is automatically heard in the headsets. The pilot and copilot will have transmit capability on the other selected transceiver Com 1 or 2, simply by using their respective PTT switch.
In CREW mode, the pilot and copilot are may use the telephone, with their respective hook switch (the pilot selects Com 3 on the Xmt selector). Any passenger who places their switch into the off-hook position will also have access to the phone, and all four passengers will hear the conversation.
In ISO intercom mode, when the PMA7000B is in the Com 3 mode, the pilot position is in the "Phone
Booth." Only the pilot will hear the telephone, and only he will be heard. He will also have access to Com 1 or 2, and will transmit on that radio using the PTT. All selected audio is provided. If any other passenger goes “off hook” they will hear the phone.
Note: Because the cellphone uses an intercom circuit, all stations on that circuit will lose intercom capability when the cellphone is in use.
3.8 Marker Beacon Operation (If present)
The optional Marker Beacon Receiver uses visual and audio indicators to alert you when the aircraft passes over a 75 MHz transmitter.
The Blue lamp, labeled "O," is the Outer Marker lamp and has an associated 400 Hertz 'dash' tone. The lamp and tone will be keyed at a rate of two tones/flashes per second when the aircraft is in the range of the
Outer Marker Beacon.
The Amber lamp, labeled "M," is the Middle Marker lamp and is coupled with a 1300 Hertz tone. It is keyed alternately with short 'dot' and long 'dash' bursts at 95 combinations per minute.
200-780-0005 Page 3-6 Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
The White lamp, labeled "I," is the Inner marker and has a 3000 Hertz 'dot' tone. The lamp and tone will be keyed at a rate of six times per second.
The audio from the Marker Beacon Receiver can be heard by selecting the "MKR" push-button switch. To adjust the volume level, there is a service adjustment located on the top of the unit.
A three-position switch is used to set the receiver sensitivity and to test the indicator lamps. Use " HI " sensitivity initially. This allows you to hear the outer marker beacon about a mile out. Then select the “ LO ” sensitivity to give you a more accurate location of the Outer Marker. The momentary down switch position is marker test, labeled "T/M" and illuminates all three lamps simultaneously to assure the lamps (internal and external) are in working order. TST does not activate MM sense output.
Pressing the marker mode select down (to “T/M”) will cause the marker audio to mute for that beacon. The next beacon received will re-activate the audio.
200-780-0005 Page 3-7 Rev. 12, April 2020
PS Engineering
PMA7000B 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. If the unit is being installed by a non-certified individual in an experimental aircraft, a factory-made intercom harness must be used for the warranty to be valid.
PS Engineering, Inc. warrants this product to be free from defect in material and workmanship for a period of two (2) years from the date of purchase. During the first twelve (12) months of the two-year warranty period, PS Engineering, Inc., at its option, will send a replacement unit at our expense if the unit should be determined to be defective after consultation with a factory technician. For the remaining twenty-four (12) months of the two-year warranty period, the unit must be returned to PS Engineering, Inc., or an authorized warranty service facility, for no-cost repair.
All transportation charges for returning the defective units are the responsibility of the purchaser. All domestic transportation charges for returning the exchange or repaired unit to the purchaser will be borne by
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.
This warranty is not transferable. Any implied warranties expire at the expiration date of this warranty. PS
Engineering SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. This warranty does not cover a defect that has resulted from improper handling, storage or preservation, or unreasonable use or maintenance as determined by us. This warranty is void if there is any attempt to dissemble this product without factory authorization. This warranty gives you specific legal rights, and you may also have other rights, which may vary from state to state. Some states do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusions may not apply to you.
All items repaired or replaced under this warranty are warranted for the remainder of the original warranty period. PS Engineering, Inc. reserves the rights to make modifications or improvements to the product without obligation to perform like modifications or improvements to previously manufactured products.
4.2 Factory Service
The units are covered by a two-year limited warranty. See warranty information. Call PS Engineering, Inc. at (865) 988-9800 before you return any unit. This will allow the service technician to provide any other suggestions for identifying the problem and recommend possible solutions.
After discussing the problem with the technician and you obtain a Return Authorization Number, ship product to:
PS Engineering, Inc.
Attn: Service Department
9800 Martel Rd
Lenoir City, TN 37772
(865) 988-9800 FAX (865) 988-6619
Email: [email protected]
Units that arrive without an RMA number, or telephone number for a responsible contact, will be returned un-repaired. PS Engineering is not responsible for items sent via US Mail.
200-780-0005 Page 4-1 Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Appendix A 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.
CASE I
The PTT is built into the pilot and copilot yokes
Simply install the plugs from the headset into the aircraft headphone jacks. Then use the yoke mounted
PTT to transmit. No other action is required.
CASE II
Built in PTT only on the pilot side only
This configuration requires a modified external PTT switch plugged into the copilot's mic jack. (See Details
Below) When the copilot's PTT is depressed, this activates an internal relay that switches the mic audio to the aircraft radio from the pilot to the copilot.
Case III
No built in PTT switch at all.
Two built-in PTT must be installed, or two external, modified PTT switches will be required for both the pilot and copilot. Modifications to the PTT are required. (See details below)
Push To Talk Modifications
When received from the manufacturer, an after-market PTT switch opens the mic audio path to the "ring" connection of the PTT mic plug until the button is pressed. When the PTT is between the intercom and the headset, the intercom function will not work unless the PTT switch is depressed. A simple modification can be performed to allow proper intercom operation. NOTE: This mod does not alter normal operation.
Below are some examples of typical modifications. Contact the PTT manufacturer for more details if necessary.
Procedures For David Clark PTT
Unscrew the round black plastic cover from the jack.
Connect the joined black wires to the red wire.
Replace the round black plastic cover.
Procedures for Telex PT-200
Unscrew the round black plastic cover from the jack.
Cut the red wire in the middle of the wire.
Strip both ends of the insulation.
Solder the two ends to the ground lug to the PTT jack.
Replace the round black plastic cover.
Procedures for Telex PT-300
Unscrew the round black plastic cover from the plug jack.
Remove the heat shrink material from the joined black wires.
Solder these two wires to the lug that has a white wire already soldered to it.
Replace the round black plastic cover
200-780-0005 Appendix A Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Appendix B – PMA 7000B Installation Drawing
Cutout size for front mount installation
6.31in (160.3 mm)
6.65 in (167 mm)
Side View
0.60 in (15.25 mm)
CG
0.35 in
(8.9 mm)
3.00 in (76.2 mm)
5.25 in
(133.4 mm)
6.28 in
(159.5 mm)
Rear View
1.315 in
(33.4 mm)
1.31 in
(33.27 mm)
0.8 in
(20.3 mm)
200-780-0005
Weight: 1.5 lb with tray and connectors ( .68 kg)
Connector viewed from the rear
Z Y X W V U T S R P N M L K J H F E D C B A
J2 (top)
22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
Keying Pins
1
Z Y X W V U T S R P N M L K J H F E D C B A
J1 (bottom)
22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Appendix B Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Appendix C Bottom Connector Interconnect
Communications
Transceiver #1
Com 1 SPR Load
Communications
Transceiver #2
Com 2 SPR Load
Communications
Transceiver #3
VHF Nav 1
VHF Nav 2
Ext. Mkr Audio
ADF Receiver
Unswitched Audio #1
Unswitched Audio #2
Unswitched Audio #3
Unswitched Audio #4
Pilot PTT
DME Receiver
AUX Audio
See Note 3
Ext. Marker Lamp (White)
Ext. Marker Lamp (Blue)
Ext. Marker Lamp (Amber)
MKR Ant.
MM Sense Output
See Note 15
ALT ICS MODE
11-33 VDC
3A Breaker
See Note 4, 9
Com 1 Audi o Hi
Com 1 Lo
Com 1 Mic Audio Hi
Com 1 Mic Key
Com 1 Spr Load
Com 1 Spr Load
See Note 8
Com 2 Audi o Hi
Com 2 Lo
Com 2 Mic Audio Hi
Com 2 Mic Key
Com 2 Spr Load
Com 2 Spr Load
Com 3 Audi o Hi
Com 3 Lo
Com 3 Mic Audio Hi
Com 3 Mic Key
Nav 1 Audio Hi
NAV 1 Audi o Lo
Nav 2 Audi o Hi
Nav 2 Audi o Lo
Mkr Audi o In Hi
Mkr Audi o In Lo
ADF Audi o Hi
ADF Audi o Lo
DME Audi o Hi
DME Audi o Lo
AUX Audi o Hi
AUX Audi o Lo
Unswi tc hed Input #1 Hi
Unswi tc hed Audi o Lo
Unswi tc hed Input #2 Hi
Unswi tc hed Audi o Lo
Unswi tc hed Input #3 Hi
Unswi tc hed Audi o Lo
Unswi tc hed Input #4 Hi
Unswi tc hed Audi o Lo
Pil ot Mic Audio Hi
Pil ot Mic PT T
Pil ot Mic Lo
Pil ot Phones (L)
Pil ot Phones (R)
Pil ot Phones Lo
Speaker Hi
Speaker Lo
RG-58A/ U Coax
Whit e Lamp Output
Blue Lam p Out put
Amber Lamp
MM Sens e
See Note 7
PA Mute Trigger
28 Vol t Li ghts Hi
14 V Lights Hi
Light s Lo
See Note 4, 9
Ground Lug
Airframe Ground
1
Z
18
14
20
B
A
F
D
E
3
W
22
C
K
15
12
H
V
16
M
J
X
8
Y
17
U
9 Bottom Connector, J1
P
R
19
L
10
13
21
S
6
11
T
Notes:
1. Pins 7, N, 14, are not used.
2. All shields should be grounded at audio panel only
other end remains f loating.
3. Speaker and Pilot Headphone ground returns
MU ST be kept separate and connected
to pin 22.
4. All Power, and Ground wires must be #18 gage wire
Lighting #22 AWG, other wires minimum #24 AWG
5. Pilot mic and headphone jacks must be isolated f rom ground.
6. Pin 20 connected through a 3 A breaker.
7. PA Mute is a TTL lev el logic output
that is pulled low when PTT activ e.
8. Speaker loads may be required on some
transceiv ers. C onsult transceiv er manufacturer's inf ormation.
9. Installations require a 3 A breaker.
Retrof it 28V installations may remov e dropping
resistor and change breaker to 3A.
10. Audio applied to Pins T, 17, U and X , is alway s presented
in speaker, pilot and copilot headphones, regardless
of SPR switch or PTT.
Audio applied to Pin T is present in pilot headphone (Rt)
in Fail-Saf e mode.
11. All shielded wires must be MIL 22750 or 27500.
12. Connect pilot headphone (L) to top connector, Pin 1,
using 3-conductor wire.
Pin 3 MUST be connected to the pilot
headphone TIP f or f ailsaf e operation.
13. Key pin between pin 7 and 8.
14. External marker audio input to Pin 21 for
units without internal receiv er only .
15. Apply ground to Pin 14 to activ ate Alternate
Intercom Mode. See Sect. 2.4.15.1
16. If "External" or "Internal" speakers are used in KMA24
installation, these connections must be remov ed from
Pins X and U.
See Note 16
To Pin 1 - Top Conn.
See Note 12
Cellular Plug (t ypcal )
T ip= Mic rophone out
Ring= Speaker audio
Base=Ground
Cellular Phone
Interconnect
5
7000B
Bottom Connector
4
2
J
K
1
Com 3 Audio
COM 3 Mic Input
Audio Lo
3/32" C ellular Jack
For Duplex (cell phone) operation
Pin J of top connector MUST BE GROUNDED
This is a typical interconnect
PS Engineering does not guarantee compatability in all cases.
200-780-0005 Appendix C Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Appendix D Top Connector Interconnect
18
10
L
V
16
15
T
A
J
14
13
R
8
9
K
C
S
P
R
12
11
N
4
D
5
E
6
F
7
H
1
2
3
B
PMA7000B J2 TOP CONNECTOR
Pilot Phones (L) -see bottom connector.
Copilot Phones (L)
Copilot Phones (R)
Copilot Phones Lo
Copilot PhonesJack
Pass. Phones (L)
Pass Phones (R)
Pass. Phones Lo
Pass. 1 PhonesJack
Pass. Mic Hi
Pass. Mic Lo
Pass. Mic Hi
Pass. Mic Lo
Pass. Mic Hi
Pass. Mic Lo
Pass. Mic Hi
Pass. Mic Lo
Pass. 1 Mic Jack
Pass. 2 Mic Jack
Pass. 3 Mic Jack
Pass. 4 Mic Jack
Copilot Mic Audio
Copilot PTT
Copilot Mic Lo
______
Control Output
_________
Notes 1, 10
C3 Duplex Mode Input
Ent. #1 Audio (L)
Ent. #1 Audio (R)
Ent. #1 Audio Lo
Ent. #2 Audio (L)
Ent. #2 Audio (R)
Ent. #2 Audio Lo
Expansion Power
Expansion Out
Expansion In
Expansion Ground
Copilot Mic Jack
Ent. #1 Input
Note 8
Ent. #2 Input
Copilot PTT
Pass. 2
Phones Jack
Notes 2, 4
Pass. 3
Phones Jack
Pass. 4
Phones Jack
1
2
3
14
Note 9
Expansion Unit p/n 11606
Notes:
1. Pin A is pulled low when AUX is active
2. All shields should be grounded at audio panel only
other end remains floating.
3. Reserved
4. All phone and mic jacks must be floating from ground.
5. This is connected to Apollo CNX80 for audio prioritization.
6. All wiring to conform to MIL 22750 or 27500,
and must be shielded as shown.
7. Passenger hook switches to be located at positions
where phone acess is desired. Grounding of any switch
causes all passengers to be heard on the cellphone.
8. Music inputs are independent. Connect together to use
a single source for both inputs.
For music distribution information, see Section 3.6.3.1.
9. For expansion unit, use part number 11606 or 11606R only.
10. When Pin J is grounded, the audio panel is in Com 3
duplex mode. This is used to interface with AirCell AT.01 or AGT.01,
or cellular phone.
11. When pin 18 is switched to ground, the PA mode is activated,
placing pilot microphone on speaker output when PTT active.
See Sect 2.5.13.
________
PA Active
Swap
Note 11
Copilot hook switch
Swap
Switch
M
Ent. #2 Mute
Note 7
Passenger Hook Switches
14
13
R
16
15
T
Ent. #1 Input
Ent. #2 Input
Alternate Music Interconnect
Note 8
200-780-0005 Appendix D Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Appendix E- Instructions for FAA Form 337 and continuing airworthiness
9.1 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 PMA7000B, you may use the following text as a guide.
Installed audio selector and 6-place intercom, PS Engineering PMA7000B, part number 7000 (X) in ( location ) at station . Installed per AC43.13-2B, Chapter 2 . Installed per PS Engineering Installation Operators Manual p/n 200-780-
(XXXX), revision (), dated ( ).
These units are FAA-Approved under TSO C50c for audio amplifiers, and/or TSO C35d for Marker Beacon Receivers, and meets appropriate environmental qualifications outlined in RTCA DO-160D as appropriate or this aircraft.
Interface to existing aircraft radios in accordance with installation manual and in compliance with practices listed in
AC43.13-2B , Chapter 2. All wires are Mil-Spec 22759 or 27500. Connection to aircraft dimmer bus is
____________________. Power is supplied to the unit through a 3A circuit breaker (type and part number), and total electrical load does not exceed % of the electrical system capacity with the PMA7000B added.
Aircraft equipment list, weights and balance amended. Compass compensation checked. A copy of the operation instructions, contained in PS Engineering document 200-780-( ), revision ( ), dated ( ), is placed in the aircraft records. All work accomplished listed on Work Order .
9.2 Instructions for Continuing Airworthiness, Audio System
Sample ICA Checklist for PS Engineering Audio System:
Section
1
2
7
8
9
10
11
12
13
14
15
16
3
4
5
6
Introduction
Description
Item
Controls
Servicing
Maintenance Instructions
Troubleshooting
Removal and replacement information
Diagrams
Special Inspection Requirements
Protective Treatments
Structural Data
Special Tools
Not Applicable
Recommended Overhaul Periods
Airworthiness Limitations
Revision
Information
Installation of audio control panel with integrated marker beacon receiver and intercommunications system.
Installation as described in manufacturer’s installation manual referenced on
FAA Form 337, including interface with other avionics audio as required.
See installation and operator’s guide referenced on FAA Form 337.
None Required
On Condition, no special instructions
In the event of a unit problem, place the unit into “off,” “fail-safe” and/or
“emergency” mode. This allows pilot communications using COM 1. Follow checkout instructions in the installation manual referenced on the FAA Form
337. For a specific unit fault, contact the manufacturer at (865) 988-9800 for special instructions.
Removal: Using a 3/32” Allen-head wrench, carefully unscrew the locking screw located in the center of the unit. While turning the wrench CCW, gently pull on the EDGES of the bezel until the unit is free from the mounting tray.
Installation: Engage the locking screw at the back. Turn the locking screw CW, while applying slight pressure to the edges of the bezel. Do not over tighten!
Not applicable
Not Applicable
Not Applicable
Not Applicable
None
Not Applicable
None
Not Applicable
To be determined by installer
200-780-0005 Appendix E Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Appendix F RTCA DO160C (EUROCAE ED-14) Environmental Qualification Form
Audio Selector Panel/Intercom/Marker Beacon Receiver
9Part Number: 7000( )
FAA TSO Number: C50c, C35d Class A, JTSO 2C35d and JTSO C50c
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
4.6.1
4.6.2
4.6.3
Conducted Tests
Equipment tested to CAT A1 & D1
-55° C Survival, -15°C Low Operating (A1)
+85°C Survival, +70°C High Short Time Operating
Not Applicable, no cooling required
50,000’ unpressurized (D1)
Not Applicable
Not Applicable
Temperature variation
Humidity
Shock
Operational
Crash Safety
Vibration
Explosion
Waterproofness
Fluids Susceptibility
Sand and Dust
Fungus
Salt Spray
Magnetic Effect
Power input
Voltage Spike
Audio Frequency Susceptibility
Induced Frequency Susceptibility
Radio Frequency Susceptibility
Radio Frequency Emission
Lightning Induced Transient
Susceptibility
Lightning Direct Effects
Icing
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
5.2
6.0
7.0
7.2
7.3
8.0
9.0
10.0
19.0
20.0
21.0
22.0
23.0
24.0
Equipment tested to Category C
Equipment tested to Category A
Equipment tested to Operational test only
Equipment tested to Operational test only
Equipment tested to Operational test only
Equipment tested to Category M & N
Category X, not tested
Category X, not tested
Category X, not tested
Category X, not tested
Category X, not tested
Category X, not tested
Equipment tested to Category Z
Equipment tested to Category B
Equipment tested to Category B
Equipment tested to Category B
Equipment tested to Category B
Equipment tested to Category T
Equipment tested to Category B
Equipment tested to Category K
Category X, not tested
Category X, not tested
200-780-0005 Appendix F Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Cross reference for Bendix/King KMA26
7
8
9
10
4
5
6
KMA26 PMA7000B
P261 Bottom Top
1 20
Function
Aircraft Power
2
3
Z
F
Power Ground
28 V Lighting
9
J
10
Com 1 Audio Hi
Com 2 Audio Hi
Com 3 Audio Hi
12 Nav 1 Audio Hi
13 Nav 2 Audio Hi
S ADF Audio Hi
6 DME Audio Hi
11 11 AUX Audio Hi
12 N/C Muted Audio 1 Hi
13 N/C Muted Audio 2 Hi
14 T Unmuted Audio 1 Hi
15
16
17
U
Unmuted Audio 2 Hi
Unmuted Audio 3 Hi
17 N/C Spare
18 N/C Key Disable
19 N/C Spare
20 N/C Spare
21 1 Com 1 Audio Lo
22
23
24
1
1
1
Com 2 Audio Lo
Com 3 Audio Lo
Nav 1 Audio Lo
25
26
27
28
1 Nav 2 Audio Lo
1 ADF Audio Lo
1 DME Audio Lo
1 AUX Audio Lo
29 N/C Muted Audio 1 Lo
30 N/C Muted Audio 2 Lo
31 1 Unmuted Audio 1 Lo
32
33
34
1 Unmuted Audio 2 Lo
1 Unmuted Audio 3 Lo
1 Chassis Ground
18
19
20
21
22
23
24
11
12
13
14
15
16
17
KMA26
P262
1
2
3
7
8
9
10
4
5
6
25
26
27
28
29
30
31
32
33
34
N/C
18
22
N/C
C
2
N/C
N/C
N/C
N/C
N/C
W
N/C
5
4
A
B
PMA7000B
Bottom
N/C
Top
16
15
Y
8
N/C
3
3
8
9
4
5
R
T
11
11
14
Reserved
Music 1 L Hi
Music 1 R Hi
Function
Pilot Mic Key
Copilot Mic Key
Pilot Mic Audio Hi
Copilot Mic Audio Hi
Key ICS Enable
Pilot Phone Audio Hi (R)
Copilot Phone Audio Hi (R)
ICS Tie Hi
Cabin Spr Hi
PA SPR Hi
Outer MKR Lamp Out
Middle MKR Lamp out
MKR ANT Shield
MKR ANT Center
Music 2 Lo
Music 1 Lo
Pilot ICS PTT
Copilot ICS PTT
Pass 1 Mic Aud Hi
Pass 2 Mic Aud Hi
Reserved
Pass 1 Phones R Hi
Pass 2 Phones R Hi
ICS Tie Lo
PA Mute
Speaker Audio Lo
PA SPR Lo
Inner MKR Lamp Out
MM Sense out
Reserved
Music 2 Left Hi
200-780-0005 Appendix G Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
P261 Bottom Top
35 D
Function
14 V Lights
36
37 P
J Com 3 Hot Mic Enable
Com 1 Mic Audio Hi
38
39
40
41
42
43
44
45
46
47
R
H
V
K
L
M
X
15
19
16
Com 1 Mic Key
Com 2 Mic Audio Hi
Com 2 Mic Key
Com 3 Mic Audio Hi
Com 3 Mic Key
Com 1 SPR Load Hi
Com 1 SPR Load Lo
Com 2 SPR Load Hi
Com 2 SPR Load Lo
Unmuted Audio 4 Hi
48 1 Unmuted Audio 4 Lo
49 N/C Spare
50 V Music Mute Enable
KMA26
N/C
N/C
N/C
N/C
3
N/C
PMA7000B
1 Pilot Phones Hi (L)
2 Copilot Phones Hi (L)
12 Pass Phones Hi (L)
10 SWAP (Optional)
Remove for 14 V lighting
L Copilot Hook Switch (opt)
N/C
N/C
M Pass Hook Switch (opt)
V Ent. #2 mute inhibit
N/C N/C AirCell Tip
N/C N/C AirCell Ring
41
42
43
44
45
46
47
P262
35
36
37
38
39
40
Bottom
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
Top
13
6
7
11
11
Ground
Function
Music 2 Right Hi
Pass ICS Key
Pass ICS Key
Pass 3 Mic Aud Hi
Pass 4 Mic Aud Hi
Pass 3 Phones R Hi
Pass 4 Phones R Hi
Pass ICS Tie
Pass ICS Tie
CVR Audio Out Hi
CVR Audio Out Lo
MKR Audio Out Hi
48
49
N/C
20
MKR Audio Out Lo
MKR SPR Power
50 Z Power Ground
This information is for reference only. PS Engineering, Inc. does not make assertion that the cross reference is accurate or complete for all installations. Consult the manufacturer’s installation manuals
200-780-0005 Appendix G Rev. 12, April 2020
PS Engineering
PMA7000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
Cross-reference for GMA340
GMA340
J1 Function
1 Mkr Ant
2 Mkr Ant Lo
3 Com 3 Audio in
4 Com 3 Lo
5 Com 3 Mic Audio
6 Com 3 Mic Key
7 ADF Audio In
8 ADF Audio Lo
9 Com 1 Audio
10 Com 1 Audio Lo
11 Com 1 Mic
12 Com 1 Mic Key
13 Com 2 Audio
14 Com 2 Audio Lo
15 Com 2 Mic
16 MASQ
17 Nav 1 Audio
18 Nav 1 Audio Lo
19 Nav 2 Audio
20 Nav 2 Audio Lo
21 DME Audio
22 DME Audio Lo
23 Com 3 Spkr Load
24 Com 3 Spkr Load
25 Com 1 Speaker Load
26 Com 1 Speaker Load
27 Com 2 Speaker Load
28 Com 2 Speaker Load
29 No Connect
30 Com 2 Mic Key
31 Unswitched Unmuted 1
32 Unswitched Lo
33 Pilot Mic Audio
34 Pilot Mic PTT
35 Pilot Mic Lo
36 Ext IM MKR
37 Ext OM MKR
38 Ext MM MKR
39 MM Sense
40 Pass HP (L)
41 Pass HP (R)
42 Pass HP Lo
43 Unswitched 2 Lo
44 Unswitched 2 Audio
1
C
5
4
2
1
8
Y
1
M n/c
V
T
17
1
6
1 n/c n/c
19
L
16
U
12
1
13
R
10
1
H
1*
9
1
P
1*
K
15
S
PMA7000B GMA340
J1 J2 J2 Function
B
A
J
1
2
3
Pilot Phones Lo
Copilot Phn Lo
Copilot Phn (L)
4
5
6
7
8
9
10
11
Copilot Phn (R)
Lights lo
14/28 V Lights
14/28 V Lights
Aircraft Power
Aircraft Power
Aircraft Ground
Aircraft Ground
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
PA Mute
Mute Inhibit
Mute Inhibit Lo
No Connect
Pilot Phones (L)
8 ohm select
Reserved
Tone Enable
Swap
Swap Lo
No Connect
Music 1 (L)
Music 1 (R)
Music 1 Lo
Music 2 (L)
Music 2 (R)
11
12
N
28 Music 2 Lo
29 No Connect
30 No Connect
31 Pilot Phones(Rt)
32 Copilot Mic Audio
33 Copilot Mic PTT
34 Copilot Mic Lo
35 Pass 1 Mic Audio
36 Pass 1 Mic Lo
37 Pass 2 Mic Audio
38 Pass 2 Mic Lo
39 Pass 3 Mic Audio
40 Pass 3 Mic Lo
41 Pass 4 Mic Audio
42 Pass 4 Mic Lo
43 Speaker Lo
44 Speaker Output
18
Z
3 n/c n/c
PMA7000B
J1 J2
1
B
3
20
20
Z
Z
E
F
D
2
16
T
13
14
10
Z
15
V
22
W
F
7
H
D
5
E
6
8
9
K
4
R
1
200-780-0005 Appendix G Rev. 12, April 2020

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