1、 EIA STANDARD TP-29C Contact Retention Test Procedure for Electrical Connectors EIA-364-29C (Revision of EIA 364-29B) August 2006 EIA-364-29C ANSI/EIA-364-29C-2006 (R2013) Approved: August 14, 2006 Reaffirmed: January 28, 2013 NOTICE EIA Engineering Standards and Publications are designed to serve t
2、he public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability 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 Standard
3、s and Publications shall not in any respect preclude any member or nonmember of ECIA from manufacturing or selling 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 ECIA members, whe
4、ther the standard is to be used either domestically or internationally. Standards and Publications are adopted by ECIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, ECIA does not assume any liability to any patent owner, nor does it assume any obl
5、igation whatever to parties adopting the Standard or Publication. This EIA Standard is 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 Standard and the IE
6、C document can be made. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of re
7、gulatory limitations before its use. (From Standards Proposal No. 4945 formulated under the cognizance of the CE-2.0 Committee on EIA National Connector and Socket Standards and reaffirmed per Standards Proposal No. 5252.06). Published by Electronic Components Industry Association 2013 Engineering D
8、epartment 2214 Rock Hill Road, Suite 170 Herndon, VA 20170 PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by the ECIA and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement. For i
9、nformation, contact: IHS 15 Inverness Way East Englewood, CO 80112-5704 or call USA and Canada (1-800-854-7179), International (303-397-7956) i Clause 1 CONTENTS Introduction .Page11.1 Scope . 11.2 Object 12 Test resources . 12.1 Equipment . 13 Test specimen 23.1 Description 23.2 Preparation 24 Test
10、 procedure . 24.1 General 24.2 Method A - Test to specified force without displacement measurement . 34.3 Method B - Test to specified force with displacement measurement 44.4 Method C - Test to destruction . 45 Details to be specified . 46 Test documentation . 5Figure 1 Force application contact al
11、ignment fixture . 3ii (This page left blank) EIA-364-29C Page 1 TEST PROCEDURE No. 29C CONTACT RETENTION TEST PROCEDURE FOR ELECTRICAL CONNECTORS (From EIA Standards Proposal No. 4945, formulated under the cognizance EIA CE-2.0 Committee on National Connector Standards, and was previously published
12、in EIA-364-29B.) 1 Introduction 1.1 Scope This standard establishes a test method to impose axial forces on the connector contacts to determine the ability of the connector to withstand forces that tend to displace contacts from their proper location within the connector insert and resist contact pu
13、llout. These forces may be the result of: loads on wire connected to the contacts; forces required to restrict contact push-through during assembly of removable type contacts into connector inserts; forces produced by mating contacts during connector mating; dynamic forces produced by vibration and
14、shock during normal use of the connectors; forces relating to bundling strains on the wire. 1.2 Object The object of this test procedure is to detail a standard method to assess the ability of the contact retaining system to withstand the axial mechanical stresses likely to be encountered during nor
15、mal usage. 2 Test resources 2.1 Equipment The test equipment shall consist of: 2.1.1 Force gauges, of suitable range for the contact size under test, so that readings will be in the middle 50% of the scale, where practical, with a nominal full scale accuracy of 2%. EIA-364-29C Page 2 2.1.2 Dial indi
16、cator gauges, or other suitable instruments of such range for the contacts under test that the readings will be in the middle 50% of the scale, with a nominal full scale accuracy of 2%. 2.1.3 Suitable compression device (such as an arbor press). 2.1.4 Steel test probes to adapt the force gauge plung
17、er to the particular contact (pin, socket, hermaphroditic) front or wiring end under test. 2.1.5 Contact insertion and removal tools, as required. 3 Test specimen 3.1 Description The specimen shall consist of a plug or receptacle with all contacts in place. 3.2 Preparation 3.2.1 All backshell hardwa
18、re and compression rings, if any, shall be removed. 3.2.2 When the specification requires the contact retention to be tested from the wire side of the connector, contacts shall have the wires cut flush or the contacts replaced as specified in the referencing document. Simulated contacts that duplica
19、te the retention feature geometry may be used in lieu of actual contacts to facilitate testing. NOTE Testing shall not be performed by pulling on the conductors. 4 Test procedure 4.1 General 4.1.1 The unmated connector shall be mounted in a position of axial alignment of the contacts with the plunge
20、r of the test gauge. A minimum of 6.1 millimeters (0.25 inch) of space shall be provided on the opposite side under test to permit any “push-through” that may occur, see figure 1. EIA-364-29C Page 3 Force probe Contact under test Connector housing 6.1 millimeters (0.25 inch) minimum NOTE Support hou
21、sing such that a minimum spacing of 6.1 millimeters (0.25 inch) is provided below the contact under test to allow for contact movement when load is applied. Figure 1 Force application contact alignment fixture 4.1.2 Unless otherwise specified, select the greater of 6 contacts of each type or 20% of
22、the contacts of each type in each connector to be tested. If a connector has 5 or less contacts of a given type, test all of that type. At least one contact of each size shall be near the periphery and one contact of each size near the center of the connector. Other contacts shall be randomly select
23、ed. 4.1.3 Unless otherwise specified, the test load direction shall be opposite to the insertion direction of the contact to its housing. 4.1.4 Unless otherwise specified in the referencing document, Method A shall be used. 4.2 Method A - Test to specified force without displacement measurement 4.2.
24、1 The contact may be lightly preloaded 13.3 newtons (3 pounds) maximum, to ensure proper seating. 4.2.2 Unless otherwise specified, an axial load shall be applied to the contact at a maximum rate of 25.4 millimeters (1.0 inch) per minute until the specified force has been reached. The specified forc
25、e shall be maintained for 6 seconds 1 second 4.2.3 If the test is required in two directions, repeat 4.2.1 through 4.2.2 from the opposite direction. EIA-364-29C Page 4 4.3 Method B - Test to specified force with displacement measurement 4.3.1 The reference (zero displacement) position of the contac
26、t shall be established. 4.3.2 Unless otherwise specified, the contact shall be lightly preloaded 13.3 newtons (3 pounds) maximum, to ensure proper seating. 4.3.3 The dimensional position of the contact relative to its reference point or plane in the connector shall be measured and record the value p
27、rior to application of the test load. 4.3.4 Unless otherwise specified, an axial load shall be applied to the contact at the maximum rate of 25.4 millimeters (1.0 inch) per minute until the specified force has been reached. 4.3.5 Unless otherwise specified, the specified force shall be maintained fo
28、r 6 seconds 1 second. 4.3.6 Upon removal of the test load, the displacement of the contact shall be performed and recorded. 4.3.7 If the test is required in two directions, repeat 4.3.1 through 4.3.6 from the opposite direction. 4.4 Method C - Test to destruction 4.4.1 Unless otherwise specified an
29、axial load to the contact at a maximum rate of 25.4 millimeters (1.0 inch) per minute until the contact retention features have been dislodged from their proper position. 4.4.2 The maximum force required to dislodge the contact shall be recorded. 5 Details to be specified The following details shall
30、 be specified in the referencing document: 5.1 Number of specimens to be tested 5.2 Number of contacts of each type per specimen to be tested 5.3 Axial direction(s) in which the test shall be conducted 5.4 Test method if other than method A 5.5 Maximum axial load to apply EIA-364-29C Page 5 5.6 Maxi
31、mum allowable contact displacement (optional) 5.7 Special requirements or precautions, if any 6 Test documentation Documentation shall contain the details specified in clause 5, with any exceptions, and the following: 6.1 Title of test 6.2 Specimen description, including fixturing 6.3 Test equipment
32、 used, and date of last and next calibration 6.4 Test procedure 6.5 Values and observations 6.5.1 Method A 6.5.1.1 Specified force and rate at which force was applied 6.5.1.2 Visual observations of contact damage and/or displacement 6.5.2 Method B 6.5.2.1 Specified force and rate at which force was
33、applied 6.5.2.2 Visual observations of contact damage 6.5.2.3 Measured contact displacement during application and/or after removal of specified force, as specified 6.5.3 Method C 6.5.3.1 Maximum force applied and rate at which force was applied 6.6 Name of operator and date of test ECIA Document Im
34、provement Proposal If in the review or use of this document, a potential change is made evident for safety, health or technical reasons, please fill in the appropriate information below and mail or FAX to: Electronic Components Industry Association EIA Standards & Technology Department 2214 Rock Hil
35、l Rd., Suite 170 Herndon, VA 20170 FAX: (571-323-0245) Document No.: Document Title: Submitters Name: Telephone No.: FAX No.: e-mail: Address: Urgency of Change: Immediate: At next revision: Problem Area: a. Clause Number and /or Drawing: b. Recommended Changes: c. Reason/Rationale for Recommendation: Additional Remarks: Signature: Date: FOR ECIA USE ONLY Responsible Committee: Chairman: Date comments forwarded to Committee Chairman: Electronic Components Industry Association 2214 Rock Hill Road, Suite 170 * Herndon, VA 20170 * tel 571-323-0294 * fax 571-323-0245 www.eciaonline.org
