Installation Manual Model #: PA-475-A (-B) (-C) Audio Amplifier Document #540021 7300 Industry Drive, North Little Rock, AR 72117 Phone: 501-955-2929 Fax: 501-955-2988 www.audiointl.
Audio International, Inc. PA-475-A (-B) (-C) Installation Document Revision History Rev.
Audio International, Inc. PA-475-A (-B) (-C) Installation Table of Contents Section Description 1.0 Page 1.1 1.2 1.3 1.4 General Information ……………………………………………. Introduction ……………………………………………………….. Purpose of the Equipment ………………………………………. Operational Features …………………………………………….. Optional Equipment ……………………………………………… 4 4 4 4 4 2.1 2.2 Application ……………………………………………………….. Introduction ……………………………………………………….. Block Diagram – Typical Application …………………………… 5 5 5 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.
Audio International, Inc. PA-475-A (-B) (-C) Installation MODEL # PA-475-A (-B) (-C) Audio Amplifier 1.0 General Information 1.1 Introduction This manual contains information for the proper installation and operation of the Audio International, Inc. (AI) Audio Amplifiers, Models # PA-475-A, PA-475-B, and PA-475-C. Also included are physical and electrical characteristics of the unit. 1.
Audio International, Inc. 2.0 PA-475-A (-B) (-C) Installation Application 2.1 Introduction The PA-475-A, PA-475-B, and PA-475-C are audio amplifiers that will produce stereo audio output for the entertainment system and monaural audio for page / chime. Up to four (4) midrange / tweeter and four (4) subwoofers can be connected to an amplifier.
Audio International, Inc. 3.0 PA-475-A (-B) (-C) Installation Installation 3.1 Prior to Installation Prior to installation, the following items should be considered: 3.1.1 During the design and layout of the aircraft cabin, careful consideration of the location of this module is necessary. Some of the items to be considered include: • Space • Available power supply • Environmental conditions (temperature, humidity, etc.) • Length of cable runs 3.1.
Audio International, Inc. 3.3 PA-475-A (-B) (-C) Installation Cautions and Warnings 3.3.1 It is important to do a pin-to-pin power and ground check on all connectors. Ensure that power and ground are applied only where specified. Damage to the unit may result if power or ground is applied to the wrong points. 3.3.2 DO NOT connect or disconnect the module while power is applied. 3.3.3 DO NOT remove any factory-installed screws. Damage to the units may result and void any warranties. 3.3.
Audio International, Inc. PA-475-A (-B) (-C) Installation 3.4.5 Data Bus Lines All data bus connections require twisted shielded cable with the cable shields properly grounded. Twisted shielded cable must be in accordance with MIL-W-27500 or equivalent. The wire size for the conductors in this cable is to be 22 AWG (minimum). The shield is to be connected wherever a shield pin is provided. Shield terminations are to be made as close to the connector pin as possible.
Audio International, Inc. 3.7 PA-475-A (-B) (-C) Installation Mating Connector Information All wiring harnesses to the unit are supplied and fabricated by the installing agency. Pin # P1 P2 P3 3.
Audio International, Inc. 3.9 PA-475-A (-B) (-C) Installation Post-Installation Test With the aircraft power “ON”, test the audio amplifier. Any unit connected to the RS485 data bus may be used to test proper operation of the unit. While an entertainment audio unit is sending audio signals through the amplifier, key and speak into a microphone to ensure that the page / chime overrides the entertainment audio. Ensure all microphones are tested.
Audio International, Inc. 5.0 PA-475-A (-B) (-C) Installation Specifications Unit Specifications Physical Specifications Housing Dimensions (L x W x H) Weight Aluminum 9.3” x 4.9” x 4.0” 23.6cm x 12.5cm x 10.2cm PA-475-A 5.1 lbs / 2.31 kg PA-475-B (-C) 5.3 lbs / 2.40 kg Electrical Specifications Power Emergency Power Data Bus Type Electric Crossover / Channel Output Output Impedance Document #540021, Rev. C, 4/2000 2.
Audio International, Inc. 6.0 PA-475-A (-B) (-C) Installation Reference Drawings The following diagrams show the unit dimensions and connector locations for the PA-475-A (-B) (-C). All dimensions are shown in inches. Document #540021, Rev.
