PS Engineering PA50 User Manual

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

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4-Channel Audio Summing Amplifier

Installation and Operation Manual

In certified aircraft, warranty is not valid unless this product is installed by

an Authorized PS Engineering dealer.

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5

5

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Document P/N 200-150-0100

October 2006

PS Engineering, Inc. 2006 ©

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 [phone].

Copyright Notice

Table of Contents

SECTION I - GENERAL INFORMATION...................................................................... 1-1

1.1 INTRODUCTION........................................................................................................... 1-1

1.2 SCOPE ............................................................................................................................. 1-1

1.3 EQUIPMENT DESCRIPTION ..................................................................................... 1-1

1.4 APPROVAL BASIS -...................................................................................................... 1-1

1.5 SPECIFICATIONS......................................................................................................... 1-2

1.6 EQUIPMENT SUPPLIED ............................................................................................. 1-2

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED .................................................... 1-3

1.8 LICENSE REQUIREMENTS ....................................................................................... 1-3

SECTION II - INSTALLATION........................................................................................ 2-1

2.1 GENERAL INFORMATION ........................................................................................ 2-1

2.1.1 SCOPE ...........................................................................................................................2-1

2.1.2 CERTIFICATION REQUIREMENTS .................................................................................... 2-1

2.2 UNPACKING AND PRELIMINARY INSPECTION................................................................ 2-1

2.3 EQUIPMENT INSTALLATION PROCEDURES .................................................................... 2-1

2.3.1 COOLING REQUIREMENTS .............................................................................................. 2-1

2.3.2 MOUNTING REQUIREMENTS........................................................................................... 2-1

2.3.3 CONNECTOR ASSEMBLY ................................................................................................ 2-2

2.4 CABLE HARNESS WIRING ............................................................................................... 2-2

2.4.1 NOISE ............................................................................................................................. 2-2

2.4.2 POWER (PIN 25).............................................................................................................. 2-2

2.4.3 UNSWITCHED INPUTS (PINS 3, 4, 15, AND 16) ............................................................... 2-2

2.4.4 OUTPUT WIRING ............................................................................................................. 2-2

2.5 ADJUSTMENTS.................................................................................................................. 2-2

2.6 POST INSTALLATION CHECKOUT ................................................................................... 2-3

2.6.1 OPERATIONAL CHECKOUT ............................................................................................. 2-3

2.7 FINAL INSPECTION........................................................................................................... 2-3

SECTION III OPERATION .............................................................................................. 3-1

SECTION IV- WARRANTY AND SERVICE.................................................................. 4-1

4.1 WARRANTY ...................................................................................................................... 4-1

4.2 FACTORY SERVICE .......................................................................................................... 4-1

APPENDIX B – INSTALLATION DRAWING

........................................................... B

APPENDIX C CONNECTOR INTERCONNECT ......................................................C

Record of revisions:

Revision Date Reason

New Release October 2006 New Release

PA50 Four-channel Audio Summing Amplifier

Installation and Operator’s Manual

PS Engineering

Section I - GENERAL INFORMATION

1.1 INTRODUCTION

The PA50 is an accessory device designed to accept four audio inputs and present a single summed output.
This accommodates the proliferation of unswitched priority audio signals in aviation, and the limited avail­ability of unswitched audio inputs to the aircraft system.

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 PA50.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the PS Engineering PA50-series of
Audio Selector Panel/Intercom Systems. This includes the following units:

Model Description Part Number

PA50 Audio Summing Amplifier 14100

1.3 EQUIPMENT DESCRIPTION

The unit provides audio summing for up to four unswitched inputs, into a single headphone level output.

1.4 APPROVAL BASIS - None

FAA Approval.

None

NOTE: The installer must determine the relevant approval basis prior to installation.

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.

200-150-0100 Page 1-1 October 2006

PA50 Four-channel Audio Summing Amplifier

Installation and Operator’s Manual

1.5 SPECIFICATIONS

ENVIRONMENTAL CONDITIONS:

PS Engineering

Specifications

Temperature Range:
Operating:

Storage:

-15º C to 55º C

-40º C to 85º C

Altitude: Up to 50,000 feet in an unpressurized area of the

aircraft.

DIMENSIONS: Height: 1.25 in. Length: 5.5 in

Width: 4.0 in . (w/ mounting flanges)

WEIGHT (With Connector): 8.5 Oz. (0.34 kg)

POWER REQUIREMENTS

Voltage: 11 to 33 VDC

Maximum Current: Mot more than 100 mA (Externally protected by a

0.5 Amp circuit breaker.)

Audio Specifications

Audio selector panel input impedance:

510 Ω

Input Isolation: -60 dB (min.)

Unswitched Audio: 4 inputs

Audio Output:

Distortion:

38 mW, no clipping into 150Ω

<1% THD @ 38 mW into 150Ω

Audio Freq. Response, 3 dB: 300 Hz - 6000 Hz

1.6 EQUIPMENT SUPPLIED

1 ea. of the following units:

Model Part Number

PA50 14100

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