Audio international PA-475-01-x Скачать руководство пользователя страница 10

Audio International, Inc.                                                               PA-475-01-x Installation & Operations   

 
Document #540144, Rev. IR, 1/2000                          

Page 10 of 15 

  

3.4.4 AI’s Proprietary RS485 Serial Data Bus 
 

The PA-475-01-x is designed to interface with other AI equipment 
via AI’s proprietary RS485 serial data bus.  This is a serial data bus 
that allows multiple units to be connected.   
 
The data bus is to be implemented using a twisted shielded pair 
cable 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.  In the event shield pins are not provided, the data bus 
shield must be terminated per AI’s proprietary RS485 specification.  
 
All modules on the RS485 data bus shall be connected in a  
“daisy-chain” configuration.  AI’s proprietary RS485 serial data bus 
specification is available upon request. 

 

3.5  

Physical Characteristics 

 

3.5.1  Refer to Section 6.0 for unit dimensions.   
 
3.5.2  Refer to Section 7.0 for attachment points. 

 

3.5.3 When mounting the unit, allow sufficient space for mating 

connectors. 

 

3.5.4  Allow a minimum of 1-inch air space around the amplifier for heat 

dissipation.  

 

 3.6   Electrical Characteristics 

 

3.6.1   Refer to Section 6.0 for electrical specifications. 

 

3.6.2  Two connectors are available on the PA-475-01-x.  P1 is an 11-pin 

connector designed to mate with an “Amphenol” connector.  The 
signals interfaced through P1 are two sets of left/right speaker 
outputs, +28 VDC main input, and +28 VDC emergency input.  The 
emergency input is required for cabin page and chime functions in 
case of primary systems power failure. 

 

P2 is a 25-pin connector.  The signals interfaced through P2 are the 
entertainment inputs of left/right audio input, PA/chime audio, PA 
key, data ID, and AI’s proprietary RS485 data bus.  The data ID 
pins are utilized to identify each unit on the data bus in a multi-
amplifier system.  These are binary ID pins and allow multiple 
amplifiers to be installed in the aircraft. 

Содержание PA-475-01-x

Страница 1: ...7300 Industry Drive North Little Rock AR 72117 Phone 501 955 2929 Fax 501 955 2988 www audiointl com Installation Operations Manual Model PA 475 01 x Stereo Subwoofer Amplifier Document 540144...

Страница 2: ...tin Subject Manual Revision Revision Date Table of Illustrations Illustration Description Page 1 Block diagram Typical Application 5 2 Reference Drawings 15 PROPRIETARY INFORMATION NOTICE Despite any...

Страница 3: ...us Control 7 3 0 Installation 7 3 1 Prior to Installation 8 3 2 Unpacking and Inspection 8 3 3 Cautions Warnings 8 3 4 Wiring Requirements 9 3 5 Physical Characteristics 9 3 6 Electrical Characteristi...

Страница 4: ...he entertainment audio when the page function is utilized There are four 4 sets of speaker outputs that can be configured to drive up to four 4 full range speakers or two 2 high range speakers and two...

Страница 5: ...systems to enhance any aircraft entertainment system Contact your AI representative for details 2 0 Application 2 1 Introduction The PA 475 01 x is part of a complete cabin audio entertainment system...

Страница 6: ...as one stereo amplifier and one bi level amplifier Additionally the amplifiers may be specified to power up with speakers active or inactive 2 2 4 A weight on wheels WOW input is provided for use that...

Страница 7: ...for operation from either power bus 2 3 Data Bus Control Multiple amplifier configurations are possible utilizing AI s proprietary RS485 serial data bus allowing independent control of each unit The n...

Страница 8: ...unit location and type of installation 3 1 4 Mounting screws are required to secure the unit Refer to Section 7 0 Reference Drawings for mounting hole diameters and configuration 3 2 Unpacking and Ins...

Страница 9: ...es and mating connectors The length and routing of external cables must be carefully studied and planned before attempting installation of the equipment Allow adequate space for installation of cable...

Страница 10: ...s available upon request 3 5 Physical Characteristics 3 5 1 Refer to Section 6 0 for unit dimensions 3 5 2 Refer to Section 7 0 for attachment points 3 5 3 When mounting the unit allow sufficient spac...

Страница 11: ...udio Input 2 Low G Right Speaker Output 2 High 7 Right Audio Input 2 High H Right Speaker Output 2 Low 8 Right Audio Input 2 Low J Left Speaker Output 2 High 9 PA Audio Input High K Left Speaker Outpu...

Страница 12: ...n be heard through the speakers 3 9 4 Remove main power from the amplifier and verify 28 VDC emergency power is present by operating the PA system Verify the subwoofers are disabled while emergency po...

Страница 13: ...rness problem Speakers turned Off Verify correct source selected Verify audio output from source Check audio in line to amplifier Verify 28 VDC input Check aircraft s circuit breaker or fuse Check har...

Страница 14: ...nominal Emergency Power 6A maximum 28 VDC PA Chime Data Bus Type AI Proprietary RS485 db2 Audio Specifications Frequency Response 20 Hz 20 000 Hz Electronic Crossover High Range 135 Hz 20 000 Hz Low R...

Страница 15: ...475 01 x Installation Operations Document 540144 Rev IR 1 2000 Page 15 of 15 7 0 Reference Drawings The following diagrams show the unit dimensions and connector locations for the PA 475 01 x All dime...

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