ECA 520F000-A-1996 Sectional Specification for Rotary Switches of Certified Quality (Low Current Capacity - 2 Amperes or Less)《已质量认证的旋转式开关分规范(2安培以下的低电流)》.pdf

1、 EIA 520F000-A 96 = 3234600 0576309 70T - ANSYEI A-52OFooO-A-1996 Approved: April 17,1996 EIA S P EC I FI CATI O N Sectional Specification for Rotary Switches of Certified Quality (Low Current Capacity = 2 Amperes or Less) EIA-520F000-A (Revision of EU-520F) ELECTRONIC INDUSTRI ES ASSOCIATION I ENGI

2、NEERING DEPARTMENT Approved For Use In The NECQ System EIA 520F000-A 3L 3234b00 O576330 Y23 NOTICE EIA Engindg Standards and Publications are designed to serve the public interest through eluninating misunderstandings between manufacturers and purchasers, fcilitathg interchangeability and improvemen

3、t 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 EIA fiom manufacturing or selling products not conforming to

4、 such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EL4 members, whether the standard is to be used either domestically or internationally. Standards and Publications are adopted by EIA in accordance with the A

5、merican 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 Standard or Publication. This EIA Specification is considered to have International Standardization imp

6、lication, 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 dety problems associated with its use or all applicable reg

7、ulatory requirements. It is the responsibility of the user of this Specification to establish appropriate safety and health practices and to detemine the applicability of regulatory limitations before its use. (From Standards Proposai No. 3505, formulated under the cognizance of EIA P- 13.1 Subcommi

8、ttee Rotary and Thumbwheel Switches.) Published by OELECTRONIC INDUSTRIES ASSOCIATION 1996 Engineering Department 2500 Wilson Boulevard Arlington, VA 22201 PRICE: Please refer to the current Catalog of EIA, JEDEC, and TIA STANDARDS and ENGINEERING PUBLICATIONS or dl Global Engineering Documents, USA

9、 and Canada (1-800-854-7179) In tema t ional (303-397-7956) Ail rights reserved Printed in U.S.A. EIA 520F000-A 96 3234600 0576333 368 EIA-52OFO00-A CONTENTS 1 SCOPE AND OBJECT 1.1 Scope 1.2 Object 2 GENERAL 2.1 Related Documents 2.2 Units and Symbols 2.3 Terminology 2.4 Preferrea Values 2.5 Marking

10、 2.6 Detail Specification 3 QUALITY ASSESSMENT PROCEDURES 3.1 Qualification Approval Procedures 3.2 Quality Conformance Inspection 4 . TEST AND MEASUREMENT PROCEDURES 4.1 Test 6-1 Strength of Actuator 4.2 Test 7-1 High/Low Temperature-Sechanical Endurance 4.3 Test 19-1 EMI/RFI Shielding Rotary Switc

11、h Terminology bexB- Preferred Dimensions for Shaft Configurations AnnexC- Truth Tables 1 1 1 3 5 5 9 13 13 13 13 i 1 1.1 1.2 2 2.1 EIA-520F000-A Page 1 SECTIONAL SPEC IF I CATION Rotary Switches of Certified Quality (Low Current Capacity - 2 Amperes or Less) SCOPE AND OBJECT ScoDe This sectional spe

12、cification relates to electromechanical rotary switches of certified quality. These families of switches are for use in electronic, communication and other low power applications. Switches covered by this specification have ratea voltages not exceeding 250 volts and a rated current not exceeding two

13、 amperes (dc or rms values). Obiect The object of this specification is to: a) Prescribe applicable preferred ratings and charac- ter ist ics b) Select the appropriate quality certification procedures and test methods from EIA 5200000 c) Prescribe general perf ormance requirements for rotary switche

14、s GENERAL The following documents of the issue in effect form a part of the suecification to the extent specified herein. - -L EIA 5201F000-A 7b M 3234600 0576333 130 W EIA-520F000-A Page 2 EIA-5200000 Generic Spec if icat i on for spec 1 si- as e Electromechanical Switches of Czrcified Quality 2.2

15、units an a Ssmbd The requirements of EIA-5200000 shall apply for snits rra symbols. Terminology shall be in accordance with EIA-5200000 and Appendix A to this specification. 2.4.1 Rated Voltage: The following voltage ratings are preferrea: 28 volts, 115 volts, 125 volts ana 250 volts. For logic leve

16、l rated switches, the preferre voltage is 5 volts dc. For low level ratea switcnes, the preferred voltage is 30 millivolts dc or peak ac. 2.4.2 Rated Current: The following current ratings are preferre: Less than 250 milliamperes - manufacturers option 250 500, 750 milliamperes 1 and 2 amperes The p

17、referre low level currenr ratina is 10 milliamperes. 2.4.3 Low Temperature Rating: The following low temperature ratings are preferrea: -100 -2!joC, -4OoCf -55OC and -65OC 2.4.4 High Temperature Rating: The following high temperature ?referred: ratrnqs are +5SoC, 7OoC, 850Cf 100Cf 125OC EIA 520F000-

18、A 96 3234600 0576334 O77 H 2.5 2.6 2.4.5 EIA-52OFO00-A Page 3 Indexing Angle (Angle of throwj: Preferred indexing angles (angle of throw) (the angle through which the shaft rotates between adjacent detent positions) Ere 1S0, 22 1/2O, 30, ;6O, 45O, 60, 90 Na r k i nq The marking requirements of EIA-5

19、200000 shall apply. De ta i 1 SDec ifi cat ia Detail specifications shall be derived from the relevant blank detail specification. If the technical requirements of this standard which are related to inspection are not entirely suitable (either for technical reasonsaor for special applications) for t

20、he rotary switch described in the detail Specification, the detail specification shall clearly describe the various amendments which are to be made to these requirements. The following information shall be given in each detail specification end the values prescribed shall preferably be selected from

21、. those given in the applicable clause of this standard, 2-6.1 Outline Drawing but in no cases shall there be less than four test specimens total. The appropriate electrical endurance test t c 1 shall be selected based upon the specified electrical ratings. Only one switch resistance cest is neee; t

22、he appropriate method should be selecze for inclusion in the detail specification. EIA-520F000-A Page 9 Ce IDSDeCtlCQ _. 3.2 Duaiitv conforman Quality conformance inspection shall be as prescribeci in EIA-5200000 ana the following requirements: a) Lot by Lot Inspection Tests: The lot by lot inspecti

23、on tests are prescribed in Table II herein. The sequence of tests is option- al unless otherwise specified by the iietail speci- f icat i on. b) Periodic inspection Tests: The periodic inspection tests are prescribed in Table IV herein. EIA 520F000-A 96 3234600 0576323 207 = 1 EIA-520F000-A TABLE II

24、 LOT-BY-LOT INSPECTION TESTS Page io TEST METHODS AND PLAN TEST M or SAMPLING GROUPS (TEST FREQUENCY) No. ws ACCEPTANCE TESTS GROUP -4 (lt-by-lot) Vi su al examination 1- 1 M See Functional operation 1-5 M sam p li ng Switch resistance 2-1 or 2-2 M plan Actuator grounding 2-4 ws below Voltage proof

25、3- 1 M Operating characteristics 1-6 M Sealing (i) 14 ws Accept on zero” sampling pian Lot size Number of switches to be tested 1-8 9 - 150 151 - 280 281 - 500 501 - 1200 1201 - 3200 3201 - 10.000 10,001 - 35.000 All 13 20 29 34 42 50 60 TABLE III MAJOR CHARACTERISTICS FOR VISUAL EXAMINATION Specifi

26、ed Number of Sections Specified NumDer of Positions Per Common Pole Functioning Stops as Requirea Gooa Detent Feel Specified Termination Specifiea Haraware Specified Shaft Flat Orientation Physical Damage (i) Notes: (1) Physical damage indicates any broken or ciistorted parts that interfere with tne

27、 normal operation Of switch. EIA 520F000-A 96 3234600 0576322 143 EIA-520F000-A Page 11 TABLE IV (i) PERIODIC INSPECTION TESTS Mi MIA I Test Methods Ld- EM1 Shielding 19-1 MIA MIA ws ws M M FIS ws M MIA MIA MIA ws M ws WS ws ws ws D D D D ND ND ND ND D ND ND ND ND ND D D D D ND 4 1 4 1 4 1 NA - - NA

28、 NA - 1 1 - 4 4 4 1 1 (5) 0 1 (5) 0 1 (5) 0 4 1 4 1 4 1 NA - D ND = IL = MIA = t.s. = t.d. = god. = NA = Destructive test Nondestructive test Inspection Level Mandatory if Applicable Minimum number of test samples Maximum permissible defective units per test Maximum permissible defective units per g

29、roup Testing is not applicable if no changes have been made to the design or the manufacturing process EIA 520F000-A 96 3234600 0576324 TL6 EIA- 520FOOO-a? Page 13 Notes: (1) Samples shall be selected from iot(s) Lnat nave passed lot by lot inspection, Table II. (2) Assessment Level C is the minimum

30、 acceptable level. Additional higher levels may be aevelope as required for specific detail specifications. (3) The electrical endurance test shall be limited to the maximum current rating at standard atmospheric conditions. (4) The appropriate electrical endurance test(s) shall be selected base6 up

31、on the specified electrical ratings. (5) Only one switch ,resistance test is needed; the appropriate method should be selected for inclusion in the detail specification. (6) The quantity of test specimens shall be the same as required for the qualification approval tests. 4 TEST AND MEASUREMENT PROC

32、EDURE 4.1 Test 6-1 Strenuth of Actuator This test is applicable only to switches having means of limiting the rotational movement (stops). The applicable rotational torque shall be specified in the detail specification. 4.2 Test 7-1 High/Low Ternuature - Mechanical Endurance If a switch is rated for

33、 millivolt level only (2.1) , or in addition has other required resistance measurements (2.2 or 2.3), only the millivolt level need be conducted. Object: The object of the test is the assessment of the attenuation of a transmitted signal provided by a panel mounted switch. Methoa: The switches shall

34、 be testea ir, accoraance with the following details: a) The test equipment shall be in accordance with Figure 1. EIA 520F000-A 96 3234600 0576325 952 EIA-52OFOOO-A Page 14 b) With the door open and the antennas in the “initiai setup“ position, establish a test level over the 200 MHz to 1 GHz range

35、such that the received signal level is at least as many dB above the RF ambient level as that of the shielded enclosure attenuation. Record the receive signal level and the signal generator output level . Repeat measurements at 100, 200, 400, 600, 800 and 1,000 MHz. Move the antennas to the final te

36、st positions, close the door and with an RF-tight blank panel between the antennas, measure the integrity of the enclosure by setting the signal generator to the same output and record the received signal level for each frequency used in step b. The shielded enclosure attenuation is then calculate u

37、sing the following equation: c) Attenuation (dB) = 20 log u E2 El = receiver reading in step b E2 = receiver reading in step c d) Mount the test switch in the blank panel with the rear of the switch outside of the shielded enclosure (towar6 the signal generator antenna). The switch shall be mounted

38、as it would be for normal installation using the mounting hardware supplied or recommended. Repeat the measurements of step c above and calculate the shielding attenuation of the switch using the new receiver readings. Criteria: The attenuation shall not be less than 60 dB over the frequency range o

39、f 100 to 1,000 MHz, unless otherwise specified. EIA 520FOOO-A 96 3234600 057b326 99 = EIA-520F000-A Page 15 Annex A ROTARY SWITCH TERMINOLOGY The following terms are used in the rotary switch nomenclature and are defined as follows: Adjustable Stops. Stops that may be adjusted to provide any number

40、of positions desired, at the option of the user. This adjustment shall be made externally and not require disassembly of the switch. Bushing Projection. That portion of the threaded mounting bushing (on one hole mounting switches) which extends beyond the mounting surface and passes through the moun

41、ting panel or bracket. Common Contact or Collectcr. Also called “pole terminal. II That contact which is common to all other contacts in any one pole throughout the full rotation of the switch. Contact Arrangement. The circuitry of the switch and/or the arrangement of terminals and contacts on a swi

42、tch section. Contact Force. The amount of force exerte by one side of a closed contact upon the other side, sometimes called - “contact pressure. Contact Resistance. The resistance of a pair of closed contacts. As measurea from terminal to terminal, this includes the circuit resistance of the contac

43、t sembers themselves. Contact-Voltage-Drop. The voltage drop measure6 ccross a pair of closed contacts - may vary with current. Continuous Rotation. A switch suppliea without stops SO that it may be rotated a full 360 degrees in either direction. A detent may or may not be include as specified on th

44、e detail specification. Cycle of Operation. Rotation of a switch from one stop to the other stop and return. In switches without stops, rotation from the first contact to the last and return to the first. _ EIA 520FOOO-A 96 6 3234600 0576327 725 EIA-520F000-A Page 16 Terminology cont inuea I Detent.

45、 The device incorporated within the switch mechanism that enables the nana to feel its way from one position to another an to leave no doubt in the operators mind that he is on the desired position. Double-End Mounting. Mounting to the panel t the front and, in addition, fastening the rear end of th

46、e switch to the chassis or frame of the instrument by means of a rear bracket. Dummy Lug. A tie-point lug not associatea with switching. Enclosed Switches. Switches where all parts of the switch are enclosed by some type of housing. (This does not mean hermetically sealea.) Fixed Stops. Devices inco

47、rporated within the switch to limit the rotation of the switch to a preetermine number of positions. Front-End Mounting. Mounting to the panel by a threaded mounting bushing t the front end of the switch only. Indexing (angle of throw) . The angular displacement of the movable contact in moving from

48、 one position to the next consecutive position. This is normally stated in degrees. Inter-Element Capacity. The capacitance between various elements of the switch. Life. The number of cycles of operations during which the electrical and mechanical performance will meet predeter- mined and stated lif

49、e-limiting criteria. Low Level Circuit. A circuit in which the open circuit voltage is 30 mV or less and the current 10 mA or less. Non-Shorting Contacts. Also called “break-before-make. Contacts such that, when switching from one position to the next, fully break from the first contact before making the next contact. Non-Turn Device (locating Key). The device which keys the switch to the panel or mounting bracket, so that the orientation of the switch with respect to the mounting surface remains constant. This may be a tab