1、Comments, suggestions or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to switchdla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASS
2、IST Online database at https:/assist.daps.dla.mil/. AMSC N/A FSC 5930 INCH-POUND MIL-DTL-24317B 1 September 2010 SUPERSEDING MIL-DTL-24317A 23 June 2004 DETAIL SPECIFICATION SWITCHES, MULTISTATION, PUSHBUTTON, ILLUMINATED AND NON-ILLUMINATED), GENERAL SPECIFICATION FOR Inactive for new design after
3、8 March 1999 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for manually operated illuminated and non-illuminated multistation, pushbutton switches for use in electronics and
4、communications equipment. 1.2 Classification. 1.2.1 Type designation. The type designation is in the following form and as specified (see 6.2): SM02 L 1 Style (1.2.1.1) Indication (1.2.1.2) Enclosure design (1.2.1.3) 1.2.1.1 Style. The switch style is identified by a two letter symbol “SM” followed
5、by a two-digit number which specifies the design and configuration covered by a single specification sheet. 1.2.1.2 Indication characteristic. Switches are designed by a single letter in accordance with table I. TABLE I. Indication characteristic. Symbol Indication characteristic L D Illuminated Non
6、-illuminated Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24317B 2 1.2.1.3 Enclosure design. The enclosure design is identified by a single digit in accordance with table II. TABLE II. Enclosure design. Symbol Seal 1 2 3 Unsealed Dripproof
7、 Watertight 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every e
8、ffort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbo
9、oks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATIONS L-P-410 - Plastic, Polyamide (Nylon), Rigid: Rods
10、, Tubes, Flats, Molded and Cast Parts. STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services COMMERCIAL ITEM DESCRIPTIONS (CIDS) A-A-59588 - Rubber, Silicone DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-5541 - Chemical Conversion Coatings on Aluminum and Aluminum Alloys. MIL-A-8625 - A
11、nodic Coatings, For Aluminum and Aluminum Alloys. MIL-DTL-6363/6 - Lamps, Incandescent, Aircraft Service Single Contact Submidget Flanged Base T-1 Bulb MIL-DTL-6363/8 - Lamps, Incandescent, Aircraft Service Single Contact Midget Flanged Base T-1-3/4 Bulb Provided by IHSNot for ResaleNo reproduction
12、or networking permitted without license from IHS-,-,-MIL-DTL-24317B 3 STANDARDS MIL-STD-108 - Definitions of and Basic Requirements for Enclosures for Electric and Electronic Equipment. MIL-STD-130 - Identification Marking of US Military Property. MIL-STD-202 - Test Methods for Electronic and Electr
13、ical Component Parts. MIL-STD-1285 - Marking of Electrical and Electronic Parts MIL-STD-2073-1 - DOD Standard Practice for Military Packaging (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch or from the Standardization Document Order Desk, 700 Robbins Avenue,
14、 Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN NATIONAL STANDARDS INS
15、TITUTE (ANSI) ANSI/NCSL-Z540.3 - Calibration Laboratories and Measuring and Test Equipment-General Requirements. (Application for copies can be found online at http:/www.ansi.org/ or 25 West 43rd Street, New York, NY 10036-8002, telephone 212-642-4900, fax 212-302-1286) AMERICAN SOCIETY OF MECHANICA
16、L ENGINEERS (ASME) ASME-Y14.38 - Abbreviations and Acronyms (Copies of these documents are available online at www.asme.org or from the American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, New York, 10016-5990 AMERICAN SOCIETY FOR TESTING AND MATERIAL (ASTM) ASTM-D635 - Plas
17、tics in a Horizontal Position, Rate of Burning and / or Extent and Time of Burning of ASTM-D4066 - Nylon, Injection and Extrusion Materials (PA) ASTM-D5948 - Compounds, Molding, Thermosetting (Copies of these documents are available online at www.astm.org or from the American Society for Testing and
18、 Materials, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania, 19428-2959.) INTERNATIONAL ORGINATIONS FOR STANDARDS (ISO) ISO 10012-1 - Quality Assurance Requirements for Measuring Equipment - Part 1: Metrological Confirmation System for Measuring Equipment. (Application for copies can be found
19、 online at http:/www.ansi.org or should be addressed to the American National Standards Institute (ANSI), 25 West 43rd Street, New York, NY 10036-8002, telephone 212-642-4900, fax 212-302-1286). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL
20、-24317B 4 SOCIETY OF AUTOMOTIVE ENGINEERS SAE-AS50881 - Wiring, Aerospace Vehicle (Copies of these documents are available online at www.sae.org or from Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, Pennsylvania, 15096-0001) 2.4 Order of precedence. Unless otherwise noted here
21、in or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific e
22、xemption has been obtained. 3. REQUIREMENTS 3.1 Detail requirements for individual styles of switches. Detail requirements or exceptions applicable to individual styles of switches shall be as specified in the applicable complementary document (e.g. specification sheet, drawings, or other document).
23、 In the event of any conflict between requirements of this specification and the complementary documents, the latter shall govern (see 6.2). 3.2 Qualification and preproduction. 3.2.1 Qualification. Switches furnished under this specification and covered by specification sheets, shall be products th
24、at are qualified for listing on the applicable qualified products before contract award (see 4.5 and 6.3.1). 3.2.2 Preproduction. Switches furnished under this specification and not covered by specification sheets shall be products which have passed the preproduction inspection specified in 4.6. Thi
25、s preproduction inspection shall be performed after award of contract and prior to production (see 6.3.2). 3.3 Material. Material shall be as specified herein. However, when a definite material is not specified, a material shall be used which will enable the switches to meet the performance requirem
26、ents of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. 3.3.1 Metals. All metal parts, other than current-carrying parts shall be of corrosion-resistant material, or shall be suitably plated to res
27、ist corrosion. 3.3.1.1 Ferrous metals. Ferrous material shall not be used for current-carrying parts except for feed-through terminals in headers. 3.3.1.2 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection against electrolysis and corrosion shall be pr
28、ovided. The use of dissimilar metals in contact, which tend toward active electrolytic corrosion (particularly brass, copper, or steel used in contact with aluminum or aluminum alloy) is not acceptable. However, metal plating or metal spraying of dissimilar base metals to provide similar or suitable
29、 abutting surfaces is permitted. The use of dissimilar metals separated by a suitable insulating material is also permitted. 3.3.2 Plastics. 3.3.2.1 Thermosetting. Unless otherwise specified (see 3.1), thermosetting plastics shall be in accordance with ASTM-D5948; however, cotton or wood-flour-fille
30、d materials shall not be used. 3.3.2.2 Thermoplastics. Thermoplastics shall not be used for major structural parts, that is, switch housing, terminal header and assembly frame. When used for other parts, the thermoplastic material shall be in accordance with ASTM-D4066 or L-P-410, or shall be of a h
31、igh temperature polycarbonate material which is self-extinguishing when tested in accordance with ASTM-D635. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24317B 5 3.3.3 Rubber. All rubber shall be in accordance with A-A-59588. 3.3.4 Finish
32、. Unless otherwise specified (see 3.1), all external aluminum parts shall be anodized in accordance with MIL-A-8625 and all internal aluminum parts shall be chemically treated in accordance with MIL-DTL-5541. Unless otherwise specified (see 3.1), bezels, mounting flanges, barriers, mounting bushings
33、 and associated mounting hardware that are designed to be exposed at the front of the panel after assembly shall have a black lusterless finish. 3.5 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of switch components and sol
34、der shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.5) 3.4 Design and construction. Switches covered by this specification shall be of the design, construction, and physical dimensions specified (see 3.1). 3.4.1 Terminals. Unless otherwise
35、specified (see 3.1), terminals shall be of the solder-lug type and shall be designed so that the wires can be mechanically secured prior to soldering. Terminals shall be solder coated; electroplated tin, or gold plated. When electroplated, the coating shall be 0.0002 inch minimum thickness, over a c
36、opper undercoat of 0.0002 inch minimum thickness. For gold-plating, the coating shall be 0.00005 inch minimum thickness over a copper undercoat of 0.0001 inch minimum thickness. 3.4.1.1 Identification of terminals. Terminals shall be identified to indicate the contact arrangement of the switch or la
37、mp circuit, as applicable (see 3.1). When specified (see 3.1), terminal identification shall be sugmented by a circuit schematic. There shall be no overmarking of terminals. 3.4.2 Plunger. The operating plunger shall be insulated from all current-carrying parts. 3.4.3 Switch housing (when applicable
38、, see 3.1). The switch housing shall be as specified. 3.4.4 Switch functions. A multistation, pushbutton switch shall incorporate two or more pushbutton stations on a common frame. The following functions may be provided (see 6.2): 3.4.4.1 Independent. There shall be no mechanical linkage. Individua
39、l pushbutton stations shall have independent functions. 3.4.4.2 Momentary interlocking. Each pushbutton station shall have momentary action, and only one button shall be depressed to actuation at one time. 3.4.4.3 Locking with master release. Each pushbutton station shall lock down when depressed an
40、d shall release by depressing a special momentary release station. One or more pushbuttons may be depressed at one time, but all shall release simultaneously. 3.4.4.4 Locking with remote release. Each pushbutton station shall lock down when depressed and shall release by energizing an electromagneti
41、c device incorporated into the pushbutton switch. One or more pushbuttons may be depressed at one time but all shall release simultaneously. 3.4.4.5 Locking and interlocking. Each pushbutton station shall lock down when depressed and shall release by depressing any other button. Only one pushbutton
42、shall be depressed to actuation at one time. 3.4.4.6 Independent locking and interlocking. Each pushbutton station shall lock down when depressed and shall release only by pushing it again. Only one pushbutton may be depressed at one time. Provided by IHSNot for ResaleNo reproduction or networking p
43、ermitted without license from IHS-,-,-MIL-DTL-24317B 6 3.4.4.7 Locking and interlocking with remote release. Each pushbutton station shall lock down when depressed and shall release by depressing a special momentary release station. Only one pushbutton may be depressed at a time. 3.4.4.8 Locking and
44、 interlocking with remote release. Each pushbutton station shall lock down when depressed and shall release by energizing an electromagnetic device. Only one pushbutton may be depressed at a time. 3.4.4.9 Remote release and lockout. The energizing of an electromagnetic device shall release all stati
45、ons and then shall prevent actuation of any station until the electromagnetic device is deenergized. 3.4.4.10 Tease-proof. One pushbutton station in a multistation switch shall always be in a down position with its associated circuitry activated. Depressing any other pushbutton station shall not cau
46、se deactuation of activated circuits until pushbutton station being depressed is positively committed to activating its associated circuitry. 3.4.5 Circuit characteristic (when applicable, see 3.1). Switch station circuitry shall be as specified. 3.4.6 Lamps (when applicable, see 3.1). 3.4.6.1 Circu
47、itry. The lamp circuit shall be independent of the switch circuit and shall be insulated from the switch housing. 3.4.6.2 Replacement. The lamps shall be replaceable from the front of the panel with the complete assembly mounted in the panel. Unless otherwise specified (see 3.1), tools shall not be
48、required to replace the lamp. 3.4.6.3 Contact and springs. Lamp contacts shall be of a copper base alloy and shall be suitably plated. Lamp contact springs shall be beryllium copper, suitably plated, or shall be corrosion resistant steel. When the contact and contact spring are combined in an integr
49、al part (one piece of metal), copper beryllium alloy, suitably plated, shall be used. 3.4.6.4 Type. Unless otherwise specified (see 3.1), switches shall accept type T-1-3/4 midget flange-base lamps. 3.4.6.5 Failure. Lamp failure shall not be considered a unit failure if, when the lamp failure is noted, a new lamp is installed immediately and the lamp functions. The test being performed shall then be continued as required. 3.4.7 Lens (when applica
