1、;SYSTEM- . - -. . I. -. . - .- - i - . - / - C CHARACTERISTIC 577-1 J ARlk . .- PUBLISHED: MARCH 15,1975 . -. . .-. I . . . -.- . .* i ._ , - .I. ,t . -, I ._ . i , i . A, ARINC 577-1 75 = 0307617 0002796 4 REPLACEMENT PAGE REVISED: March 31 1975 AERONAUTICAL RADIO, INC. 2551 Riva Road Annapol is, M
2、ary1 and 21 401 ARINC CHARACTERISTIC 577-1 AUDIBLE WARNING SYSTEM ARINC Characteristic 577-1 was first oublished on March 15, 1975 Prepared by the Air1 ines Electronic Engineering Committee Char. 577 approved-by the Airlines Electronic. Engineering Committee: April 21, 1970 Char. 577 approved by the
3、 Air Lines Cornunications Administrative Council Char. 577-1 approved by the Airlines Electronic Engineering Committee: August 12, 1971 for the Member Airlines: June 19, 1970 . _- : ARINC 577-1 75 m 0307617 OOOZ797 b m FOREWORD -C- Activities of AERONAUTICAL RADIO, INC. (ARINC) and the Purpose of AR
4、INC Characteri sti cs Aeronautical Radio, Inc., is a corporation in which the United States scheduled air1 ines are the principal stockholders. Other stockholders include a variety of other air transport companies, ai rcraft manufacturers and foreign flag airlines. Activities of ARINC include the op
5、eration of an extensive system of domesti c and overseas aeronaut ca I I and rad o stat ons, the f u I f i I I ment of systems requirements to accompl ish ground and airborne compatibi I ity, the allocation and assignment of frequencies to wet those needs, the coordi- nation incident to standard air
6、borne communications and electronics systems and the exchange of technical information. ARINC sponsors the Airlines Communications Administrative Counci I (ALCAC), composed of the top air1 ne communications officials, which establishes the industry common interest communications policies. Air1 ines
7、Electronic Engineering Committee (AEEC), composed of airline technical personne I. The AEEC formu lates standards for e lectroni c equi pment and systems for the airlines. The establishment of Equipment Characteristics 1s a principal function of this Committee. One of the ALCAC standing committees I
8、s the An ARINC Equipment Characteristic is final zed after investigation and coordination with the airlines who have a requirement or anticipate a requi remen?, w 1 th other ai rcraft operators, with the Mi I I tary servi ces having similar requirements, and with +he equipment manufacturers. release
9、d as an ARINC Equipment Characteristic only when the interested airline companies are in general agreement. Such a release does not commit any airline or ARINC to purchase equipment so described nor does it estab I i sh or i ndi cate recognition of the ex stence of an operati ona I requirement for s
10、uch equipment, nor does it constitute endorsement of any manufacturers product designed or built to meet the characteristic. ARINC Characteristic has a two-fold purpose, which Is: It is An (I) To indicate to prospective manufacturers of airline electronic equipment the considered opinion of the airl
11、ine technical people, coordinated on an industry basis, concerning requisites of new equipment, and (2) To channel new equipment designs in a direction which can result . in the maximum possible standardization of those physical and electrical characteristics which affect interchangeabi I ity of equ
12、ipment without seriously hampering eng neeri ng i ni tiati ve. II - . ,L . ARINC 577-1 75 O307617 000279 TABLEOFCONTENTS IT EM 1. o 1.1 1.2 1.3 1.3.1 1.3.2 1.4.1 1.4 1.4.2 1.5 1.6 2. o 2.1 2.1.1 2.1.2 2.1.1.1 2.2 2.3 2.4 2.4.1 2.4. 2 2.4.3 2.5 ARINC CHARACTERISTIC NO. 577 SUBJECT INTRODUCTION AND DE
13、SCRIPTION Purpose of this Characteristic Functions and Modes of Operation Unit Description Generator Unit Control Panel Interchangeability Requirements General Requirements for Inter- changeability Inter changeability Requirements for the ARINC Audible Warning Generator Regulatory Approval Applicabl
14、e Publications, Specifications, and Reports STANDARDS REQUIRED TO EFFECT INTERCHANGEAB1,LITY Form Factors and Connectors Generator Unit Form Factor Cooling ATE Connector Weight Interw ir ing Power Circuitry Primary Power Inputs Power Control Circuitry The Common Ground Standard Outputs PAGE 2 3 3 3
15、3 4 4 4 5 5 6 6 6 7 8. 8 3. o AUDIBLE WARNING GENERATOR DESIGN 8 3.1 Generator Inputs 8 3.1.1 Activation and Isolation 8 3.1.2 Priority Logic 9 3.1.3 Reset Capability 10 3.1.4 Channel Input Assignment 11 3.1.5 Decision Height Alert Input 11 3.2 Audible Message 12 3.2.1 Storage and Time 12 3.2.2 Mess
16、age Characteristics 12 3.2.3 Performance 12 ARINC 577-3 75 W 0307637 0002777 T WI IT EM 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3. 3. 6 3.4.1 3.4.2 3.4 3.4.1.1 ATTACHMENTS 1 2 2 2 3 4 APPENDIX 1 TABLE OF CONTENTS (Contd) ARINC CHARACTERISTIC NO. 577 SUBJECT Audio Output Circuits Audio Output Amplifiers an
17、d - Power Level Adjustment Frequency Response Harmonic Dis tortion Acceptable Noise Level Flutter Failure Monitoring Generator Failure Indication Failure Monitor Outputs Use of Failure Monitor as Back-up Warning Mode PAGE 13 13 13 13 13 13 14 14 14 14 14 Generator Connector Positioning i5 Standard I
18、nterwiring (Part II) 19 Notes Applicable to Standard Interwiring 24 Channel As s ignment 25 Typical Example of Audible Warning System 26 Standard Interwiring (Part I) 16 Typical Example of Warning Char acte ri s ti c s 27 - iv - i I ARINC 577-3 75 O307637 0002800 2 ARINC PROJECT PAPER NO. 577 1 e AI
19、RBORNE AUDIBLE WARNING GENERATOR 1. O INTRODUCTION AND DESCRIPTION 1.1 Purpose of this Characteristic This document is intended to set forth the basic requirements for Audible Warning Generat ors specifically designed for installation in all types of comer cia1 aircraft, including supersonic. The in
20、tent of this document is to provide general and specific design guidance for the development and installation of an Audible Warning Generator primarily for airline use. the specific requirements necessary to provide the desired operational capability and the standards necessary to achieve interchang
21、eability, Equipment manufacturers should note that this document aims to encourage them to produce maintenance-free, high performance equipment rather than equipment of minimal weight and dimensions. They are at liberty to accomplish this objective by means of As such, this guidance will include des
22、ign techniques they consider to be the most appropr their airline customers are interested primarily in the rather than the means to achieve it. ate, as end result 1.2 The function of the Audible Warning Generator (AWG) is to provide 25 different channels with sound and/or voice warnings, activated
23、by discrete input signals and generated as a function of an unsafe condition of important systems of the aircraft. The outputs are available for audible display to the cockpit crew members. Functions and Modes of Operation COMMENTARY The AWG unit may replace currently used warning sources such as ho
24、rns, bells, buzzers, etc. The increasing number of these warning sources in todays and future aircraft along with a generally incre.ased workload for cockpit crews, led to the decision made by airframe manufacturers to generate all or most of these sounds electronically in a centralized unit. capabi
25、lity to generate voice warning either or not in conjunction with conventially, used sounds, At the same time such a unit provides the -1- - ARINC 577-1 75 0307b17 O002801 4 -I 1.2 Functions and Modes of Operation 1 COMMENTARY (Contd) While no requirement in this Characteristic equipment manufacturer
26、s should consider a design goal of 40000 flight hours MTBF, as a comparable figure with conventional warning devices in aircraft operation today. 1. 3 Unit Description 1.3.1 Generator Unit The generator unit should house all of the components, electronic circuitry, etc, incident to the functioning o
27、f the system, including the reception and the recovery of the information contained in the received signals. in Section 3. This unit should also originate the outputs defined 1. 3. 2 Control Panel Contrary to normal practice in ARINC Characteristic a standard control panel will not be specified, bec
28、ause only one switch and one light are needed to perform the required functions. 1.4 Interchangeability Requirements 1.4.1 General Requirements for Interchangeability One of the primary functions of an ARINC Equipment Characteristic is to designate, in addition to certain performance parameters, the
29、 interchangeability required of aircraft equipment- produced by various manufacturers. Manufacturers are referred to Section 1.6 of ARINC Report No, 414 for the airline industrys definitions of Terms and General Requirements for interchangeability. explained in that Report, the degree of interchange
30、ability considered necessary and attainable for each particular equipment is specified in the p e rtinent ARIN C Equipment Char a c t e ris tic. Furthermore, “Generation Inter changeability“ is stated as a requirement by the airline industry. “Generation Inter - changeability“ as sures that future e
31、volutionary equipment improvements and the inclusion of additional functions in As -2- ARINC 577-1 75 0307617 0002802 b 1.4 Inter changeability Requirements 1.4. 1 new equipments during the next few years do not violate the interwiring and form factor standards set forth in this Document, The provis
32、ions to assure “Generation Interchangeability“ are set forth-as can best be predicted in various places throughout this Document to guide manufacturers in future developments. General Requirements for Interchangeability (Contd) 1.4.2 Inter changeability Requirements for the ARINC Audible Warning Gen
33、erator Unit interchangeability is required for the generator unit, regardless of the manufacturing source of the individual items. 1, 5 Regulatory Approval The Audible Warning Generator must meet all applicable FAA requirements including TSO requirements. Manufacturers should obtain all necessary in
34、formation on these requirements from the FCC and the FAA as they are not stated in this Characteristic nor are they available from ARINC. 1. 6 Applicable Publications, Specifications and Reports Rather than tabulate herewith all of the reference documents, the reader is referred to ARINC Report No.
35、414, “GeneralGuidance for Equipment and Installation Designers“ and specificalIy Appendix I of that document which contains a tabulation of the current reference publications of ARINC and other organizations. which are of importance to equipment designers, installers, and users. 2. O STANDARDS REQUI
36、RED TO EFFECT INTERCHANGEABILITY It is of prime importance that the Industry establish specific form factors, mounting provisions, interwiring, input and output interfaces and power supply requirements for the Audible Warning Generator. These standards are necessary to ensure the continued independe
37、nt design and development of both the equipment and the airframe ins tallation. -3- 1 ARINC 577-1 75 m 0307bL7 0002803 8 m 2. O It should be noted that although this ARINC document does not prohibit manufacturers from developing reproducers having other form factors and interwiring features, then be
38、 a standard aircraft installation to accommodate some special system could very well make the use of that other design prohibitively expensive for the customer, practical advantages of developing equipment in accordance with the form factor, interwiring and input and output interface standards of th
39、is Document. STANDARDS REQUIRED TO EFFECT INTERCHANGEABILITY (contd) the practical problem of re-designing what will Thus, manufacturers should recognize the 2.1 Form Factors and Connectors 2.1.1 Generator Unit Form Factor The Aural Warning Reproducer Unit should be contained in a short 1/2 ATR case
40、 (See ARINC Specification 404 for kase dimensions). The rear connector should be a Cannon DPX2-106S-106S-34B or equivalent, located right-side up on the vertical center line of the unit as defined in ARINC Specification 404, drawing showing the position of this connector to be described in Section 6
41、. O may be found in Attachment 1. An outline control The generator should conform to all the specific requirements of dimens ion tole rances, hold - downs, projections, handles, extractors and specified limits on weight and center of gravity as set forth in ARINC Specification 404. ARINC Report No,
42、414 for further details on shock mountings and equipment racking tolerances. See Section 30.4 of 2.1. 1.1 Cooling Adequate cooling for continuous operation at the maximum ambient temperature required by the regulatory test procedures should be achieved by radiation and convection from the exposed su
43、rfaces of the case of the equipment which should be undrilled. COMMENTARY Far too many equipment failures have been, and continue to be, caused by the effects of contaminants finding their way into the “works“ via the “cooling holes“ in the case, The Industry now regards the cooling of equipment by
44、means of passing air through it to be generally unacceptable, and expects equipment designers to think in terms of removing unwanted heat by conducting it to the undrilled outer surfaces of the case, from which it may be dissipated by radiation and convection. -4- 2.1.2 ARINC 577-1 75 O307637 000280
45、4 T ATE Connector Due to the nature of the audible warning generator in that it has all inputs and outputs readily available at the main connector, no need is anticipated for a separate ATE connector. 2, 2 Weight For the information of the installation designer in selecting proper shock mounts, in t
46、hose circumstances where shock mounts are required, and so that common shock mounts can be used inter- changeably Gith all manufacturer s1 units, this C,haracteristic sets forth the probable range of minimum to maximum weight which can be expected for the equipment. misconstrued as a specification o
47、n the aceeptable weight limits for the equipment. regarding any new equipment intended to conform with this Characteristic where the unit weights do notfall within the ranges set forth below. Such information can then be disseminated to the airlines and airframe manufacturer s. This is, however, not
48、 to be Manufacturers are asked to keep ARINC informed. Equipment Un it Weight (lbs. ) Gene r ato r Less than 12 COMMENTARY Why Not Specify a Particular Weight Manufacturers of equipment for airline use. are quite familiar with the usual weight reducing techniques whereby high strength and vibration
49、resistance can be provided in airborne equipments without the necessity for heavy castings and structures. ARINC Characteristic to not - specify a particular weight limitation because the manufacturers of airline equipment are fully familiar with the competitive sales advantage of a light-weight unit where weight can be reduced without affecting performance, rigidity and reliability. Thus, even though no requirement is specified herein for weight reduction, manufacturers would be well advised to study the typical designs of airline electronic gear and fam
