ECA EIA-498AAAA-1992 Detail Specification for Short Stroke Keypads《短行键的详细规范》.pdf

1、I w I Reproduced By GLOBAL ENGINEERING DOCUMENTS With Thr Permission of IA Under Royalty Iireement EIA S P ECI FI CATI ON Detail Specification for Short Stroke Keypads * EIA LIBAAAA 92 m 3234b00 05023b 118 m I I QiiEEEs ANSU IA-498 AAA A- I992 APPROVED: Mey 26, 1992 AOQUST 1992 ELECTRONIC IN DUSTRI

2、ES ASSOCIATION ENGINEERING DEPARTMENT Approved For Use In The NECQ System - EIA q7AAAA 72 m 3234600 0502370 93T m NOTICE EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating inter

3、changeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or non- member of IA from manufacturing or sellin

4、g products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EIA members, whether the standard is to be used either domestically or internationally. Recommended Standards and Publications are

5、 adopted by EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Recommended Standard or Publication. This EIA Specification is

6、considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison between the EIA Specification and the IEC document can be made. This Specification does not purport to address all safety

7、problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Specification to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 2252 f

8、ormulated under the cognizance of P-13.3 Subcommittee on Sensitive, Pushbutton and Keyboard Switches) Published by ELECTRONIC INDUSTRIES ASSOCIATION Engineering Department 2001 Pennsylvania Avenue N.W. Washington, D.C. 2ooo6 PRICE: Please refer to the current Catalog of EIA & JEDEC STANDARDS & ENGIN

9、EERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-7179) International (71 4-261 -1 455) Copyright 1992 AI1 rights reserved Printed in U.S.A. EIA 49BAAAA 92 m 3234b00 0502373 87b m PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by the EL4 and may not be r

10、eproduced without permission. Organizations may obtain permission to reproduce a iimited number of copies through entering into a license agreement with the EIA. For information, contact EL4 Engineering Publications Office 2001 Pennsylvania Ave., N.W. Washington, D.C. 20006 (202)457-4963 IA q9BAAAA

11、92 3234600 0502372 702 National rtandardr Organization Electronic Industries Association 2001 Pennslyvania Ave. N.W. Washington, D.C. 20006 Generic Specification lumber Keyboard switches of certified quality EIA-4980000 I Outline Drawing 10.7 (4 78.74 +1.5 -5 (3.10 +a6 -.ml 1 T i 70.74 +1.5 -.S (3.1

12、0 +.o6 -02) * JIT 3 EQ SPS TOL NOK ACCUM. p35 46 -.oz) 3 EO. SPS TOL. NON- :E- f 10.7 42) 3EQSPS 19.0 ACCUM. fOL “- (.750) 78.74 +1.5 (3.10 +.O6 c- -.5 + -.oz Page 1 Detail Specification Number EIA-498AAAA Blank Detail Specification EIA-498AA00 Prduct Demcription - short stroke keypad - .750 button

13、spacing - 12 or 16 buttons (keys) - watertight panel seal - optional internal EMI/RFI shield Electrical Circuit SPST per station (key) with various interconnection of stations Typical Construction printed circuit board base silicone rubber over keypad insertable legends Application I ! I i Informati

14、on on the availability of components qualified to this specification is given in the Qualified Products List I IA 498AAAA 92 = 3234b00 0502373 b49 EIA-49aAAAA Page 2 1 DETAIL SPECIFICATIOIU FOB SERT STROlE KEYPADS The complete requirements for the switches described herein shall consist of this deta

15、il specification, the latest issue of EIA-498A000 “SECTIONAL SPECIFICATION FOR SHORT STROKE SWITCH PANELS“ and the latest issue of EIA- 4980000 “GENERIC SPECIFICATION FOR KEYBOARD SWITCHES OF CERTIFIED QUALITY.“ 1.0 SECTION ONE - SCOPE AND OBJECT 1.1 SCOPE The short stroke keypads of certified quali

16、ty covered by this detail specification: 1) have maximum enclosure dimensions of 3.16 by 3.16 by .53 (excludes 2) have a maximum rated voltage of 24 V dc 3) have a maximum rated current of 20 mA. terminals and mounting studs) 1.2 OBJECT The object of this detail specification is to provide all infor

17、mation required for the identification, quality assessment and certification of these keyboards. The information contained herein or by reference is complete and sufficient for inspection purposes. 2.0 SECTION TWO - GENERAL 2.1 PART NUMBER Each keypad shall be classified and identified (marked) as f

18、ollows: A) The number of this specification EIA-498AAAA. BI Discrete switch identification per Table II. EXAMPLE: EIA498AAOlC10 identifies a keypad with 16 buttons, 0.450 mounting stud length, shield, solder terminals and key legends as shown in Figures 3 through 10. 2.2 MARKING The marking of the s

19、witch and package shall be in accordance with the requirements of 2.5 of EIA-4980000. 2.3 ORDERING INFORMATION Orders for switches covered by this specification shall contain the following infomation as a minimum: a) The applicable part number per 2.1 above. b) c) When certified records of released

20、lots are required, include The number and issue of this detail specification. “CERTIFIED RECORDS REQUIRED.“ EIA 498AAAA 92 3234600 0502374 585 EIA-4 9 am Page 3 2.4 CERTIFIED RECORDS OF RELEASED LOTS When certified records of released lots are specified on the purchase order by the buyer, the suppli

21、er shall provide the attribute data (i.e. number of components tested and number of defective components) for each lot-by-lot acceptance test performed on the switches shipped to the buyer, When specified, the supplier shall also provide the complete test report for the last complete periodic inspec

22、tion. If no periodic inspection has been performed, the supplier shall provide the original qualification test report. 2.5 SAFETY CONSIDERATIONS The user shall consider the suitability of the switch with regard to any safety requirements applicable to the equipment. 2.6 COMMON FEATURES 2.6.1 TERMINA

23、LS 2.6.1.1 WIRE WRAP TERMINALS - shall be 0.025 square phosphor bronze with 30 microinch minimum nickel plate per QQ-N-290 under 30 microinch minimum gold plate per MIL-G-45204, Type I or II. SOLDER PLATE TERMINALS - shall be 0.025 square phosphor bronze or beryllium copper with 50 microinch nickel

24、plate under 100 microinch minimum tin-lead containing 50-95% tin per MIL-P-81728, 2.6.1.2 2.6.1.3 TURRET TERMINALS - 0.050 diameter double turret brass, CA360, + hard with 300 - 500 microinch thick electrosolder over 200 - 400 microinch thick copper plate. 2.6.2 ALTITUDE RELIEF HOLES Switches shall

25、have altitude relief hole(s.1 between the rear (bottom the switch and the volume under the silicone rubber boot. 2.6.3 COLORS Colors shall be in accordance with the following FED-STD-595 code numbers : black = 27038 white = 27875 orange = 22246 red = 21105 of EIA 4AAAA 92 D 3234600 0502375 411 D E I

26、A-4 9 8AAAA Page 4 2.7 DIMENSIONAL PARAMETERS See Figures 1 AND 2, 2.8 RATINGS AND CHARACTERISTICS 2.8.1 RATINGS Alt i tude operating : storage and non- rati Electrical rating (resistive) Flammability Fluid resistance Fungus resistance Icing Moisture resistance Random vibration Salt spray Sand and d

27、ust Sealing Shock Temperature Thermal Shock Vibra t i o ri sea level to 3050 meters ( 10,000 feet 1 sea level to 10,000 meters (40,000 feet) 24 V dc at 20 mA not applicable not applicable applicable not app 1 icable applicable (*) not app 1 icab le applicable (*I applicable (* applicable (A) 100 g,

28、half sine, 11 ms operating and non-operating -4OC (-40F) to 70.C (160F) -4OC (-40F) to 70C (160F) 10 g, 10-500 HZ TO BE TESTED IN MOUNTED STATE WITH OUTSIDE (BOOT) EXPOSED 2.8.2 CHARACTERISTICS Altitude voltage drop Capacitance Contact bounce EM1 shielding Endurance Electrical (resistive) logic leve

29、l low level mechanical rsion in cleani S 1 ve t 250 V at 3050 meters (10.000 feet) not applicable 10 ms maximum. See 5.0. The switch shall have a metallized MYLAR foil shield on the inside of the switch which is connected to the switch mounting studs or the backside of the RFI shielded board. The fo

30、il shall be turned down over the board edges and conducting paths must exist between the foil and the RFI shielded board. 100,000 operations 100,000 operations not app 1 icab le 100,000 operations (50,000 operations at -4OOC and 50,000 operat ions at +7OoC 1 not app 1 icable EIA 498AAAA 92 I 3234b00

31、 050237b 358 = Insulation resistance Lamp circuit resistance Low temperature operation Mass Operating characteristics operating force -37OC to 25C -37C to -45C total travel Over load Resistance to soldering heat Strength of: actuator termination wire wrap solder plate turret mounting stud Solderabil

32、ity Stray lights Sunlight readability Switch resistance Temperature rise Voltage proof 3.0 SECTION THREE - QUALITY ASSESSMENT EIA-498AAAA Page 5 1000 Ma at 100 V dc not applicable applicable not applicable 30 oz max. 50 oz max. .150 inch max. not applicable not app 1 icab 1 e 10 lb static load 3.5 i

33、n-oz torque 15 lb pull test 3.0 lb-in torque ap p 1 ic ab le not applicable not applicable 100 s1 max. initially, 160 Q ma. after mechanical endurance when measured at 2-6 V dc and 1OOmA. not applicable 250 V ac 5 lb push-out force PROCEDURES The quality assessment procedures are prescribed in Secti

34、on Three of EIA 498AOOO and are supplemented by the following information: 3.1 QUALIFICATION APPROVAL INSPECTION TEST The qualification approval inspection tests are prescribed in Table I herein for the qualification of the switches covered by this detail specification. 3.1.1 TEST SPECIMENS Sixteen

35、button keypads shall be used for qualification testing. Any available key layout may be used but all test samples shall have the optional RFI/EMI shield. 3.1.2 EXTENT OF QUALIFICATION APPROVAL Successful completion of qualification testing shall qualify all switches described by this detail specific

36、ation. EIA 49AAAA 92 3234b00 0502377 294 EIA-49aAAAA Page 6 B E-. z v, wo hb O O O O U U O0 Li O Y *A 5: 2 c O0 A ss z in E V 2 5: c1 zr- OcvrnUI- mngb Um9cohrn mdddm HddUrn UUU*UU uuuee UUUUU uu . . S O .A au 463 E (dA a 4 4 a u a 3 O d 0 a 3 O d 0 pi 3 u 2 EIA 498AAAA 92 3234600 0502378 120 EIA-49

37、8- Page 7 U * h + O Y Y iu E 1 O O O c O 2 9 ouou m O0 uu II Il i.5 YY (d 4Li L EIA 498AAAA 92 3234600 0502388 07T W I BLACK - - EIA-498AAAA Page 17 TS T I j TST 1 (BLANK) i i l I f I l i 1 1 BRT 1 (BLANK) I BCK ADV I L 6.35 I (BLANK) 1 BCK 1 ADV i ,i I ( BLANK 1 CLR (.25) I I ERR 1 DSP 1 I CLR RTN END I LETTERS/NLWBERS: 0.10 HIGH NOMINAL MODIFIED GOTHIC LETTERS: 0.10 HIGH NOMINAL MODIFIED GOTHIC LEGEND KEY INSERT LEGEND COLOR COLOR ! TST i RTN 1 NOTE: INSERT FOR (BLANK! KEY SHALL HAVE NO LEGEND NOTE: ISSERT FOR (BLANK) KET SHALL H.4VE KO LEGEND FIGURE 9 - KEY LYOT FIGURE 10 - KEY L4YOUT