1、MIL-I-24728A 23 July 1992 SUPERSED% MIL-I-24728(NAVY) 31 August 1989 MILITARY SPECIFICATION INTERCONNECTION BOX, FIBER OPTIC, METRIC, GENERAL SPECIFICATION FOR This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specificatio
2、n covers the performance requirements of fiber optic interconnection boxes. The interconnection boxes are used to house splices, connectors, and couplers, and to provide a means of distributing cables and fibers to user equipment. This specification covers the mechanical, chemical, and environmental
3、 conditions within which an interconnection box must operate and the means by which the interconnection box is to be tested for use in those environments. 1.2 Part or Identifying Number (PIN). The PIN shall consist of the letter “M“ fallowed by the basic specification sheet number, and a sequentiall
4、y assigned dash number (see 3.1). Example: M24728/01 - O1 - i I l l l l Basic specification L I sheet number I I I Dash number from 1 specification sheet (see 3.1) I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of I j use in improving this document
5、should be addressed to: Naval Sea Systems Command, Sea 5523, DoD 1 I Standardization Program and Documents Division, Department of the Navy, Washington, DC 20362-5101 I I by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of I I this document or by letter.
6、 1 AMSC N/A FSC 6099 DISTRIBUTION STATEIIENT A. Approved for public release; distribution is unlimited. c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-2472BA 60 m 9999906 3360570 b42 m MIL-I-24728A 2. APPLICABLE DOCUMENTS 2.1 Government docu
7、ments. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks - form a part of this document to the extent specifled herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of S
8、pecifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL QQ-A-596 TT-1-735 MILITARY MIL-S-901 MIL-H-5606 MIL-T-5624 MIL-P-15024 MIL-P-15024/5 MIL-E-I6400 MIL-F-I6884 MIL-1-17214 MIL-L-I7331 MIL-E-I7555 MIL-L-23699 MIL-E-24142 MIL-E-2414
9、2/6 MIL-P-24705 MIL-C-24712 DOD-C-85045 STANDARDS FEDERAL FED-STD-313 MILITARY MIL-STD-108 MIL-STD-454 MIL-STD-810 MIL-STD-1285 MIL-STD-1344 MIL-STD-1472 MIL-STD-167/1 MIL-STD-1678 Aluminum Alloy, Permanent and Semi-permanent, Mold Castings Isopropyl Alcohol. Shock Tests, HI (High Impact), Shipboard
10、 Machinery, Equipment and Systems, Requirements for Navy. Hydraulic Fluid, Petroleum Base, Aircraft, Missile, and Ordnance. Turbine Fuel, Aviation, Grades JP-4 and JP-5. Plate, Tags, and Bands for Identification of Equipment. Plate, Identification. Electronic, Interior Communication and Navigation E
11、quipment, Naval Ship and Shore. General Specification For. Fuel, Naval Distillate. Indicator, Permeability, Low-Mu (Go-no-go). Lubricating Oil, Steam Turbine and Gear, Moderate Service. Electronic and Electrical Equipment Accessor,ies, and Provisioned Items (Repair Parts): Packaging of. Lubricating
12、Oil, Aircraft Turbine Engine, Synthetic Base. Enclosures for Electrical Fittings and Fixtures, General Specification For. Enclosures, Submersible (15 foot), Sizes 8 by 10 through 14 by 26. Penetrators, Multiple Cable, for Electrical Cable, General Specification for. Coatings, Powdered Epoxy (Metric)
13、. Cable, Fiber Optic, General Specification For. Material Safety Data Sheets, Preparation and Submission of. tric and Definitions of and Basic Requirements for Enclosures for Elec Electronic Equipment. Standard General Requirements for Electronic Equipment. Environmental Test Methods and Engineering
14、 Guidelines. Marking of Electrical and Electronic Parts. Test Methods for Electrical Connectors. Human Engineering Design Criteria for Military Systems, Equipment and Facilities. Mechanical Vibrations Of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited). Fiber Optics Test
15、 Methods and Instrumentation. 1 O (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2 Provided by IHSNot for ResaleNo reprodu
16、ction or networking permitted without license from IHS-,-,-MIL-I-24728A bO D 999990b llb0571 5B9 m MIL-I-24728A 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD
17、adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues,of documents not listed in the DODISS are the issues of the documents cited in the solicitation- see 6.2). Electronic Industry Association (EIA) EIA-455 * EIA-455-4 - * EIA-455-13 -
18、* IA-455-20 - * EIA-455-36 - * Has been adopted Standard Test Procedures for Fiber Optic Fibers, Cables, Transducers, Connecting and Terminating Devices. Fiber Optic Connector/Component Temperature Life. Visual and Mechanical Inspection of Fibers, Cables, Connectors and/or Other Fiber Optic Devices.
19、 Measurement of Change in Optical Transmittance. Twist Test for Fiber Optic Cable Connecting Devices. by DoD (Application for copies should be addressed to the Electronic Industries Association, 2001 Eye Street, NW, Washington, DC 20006.) Underwriters Laboratories (UL) Publications * UL-94 - Tests f
20、or Flammability of Plastic Materials for Parts in Devices and Appliances. UL-1479 - Fire Tests of Through-Penetration Fire Stops. * Has been adopted by DoD (Application for copies should be addressed to Underwriters Laboratories Publications, Publication Stock, 333 Pfingsten Road, Northbrook, IL 600
21、62.) American Society for Testing and Materials (ASTM) * ASTM B 209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate. * ASTM B 221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, * ASTM D 1141 - Standard Specification for Substitute Ocean W
22、ater. Shapes and Tubes. ASTM D 3935 - Standard Specification for Polycarbonate (PC) Unfilled and Reinforced Material. * Has been adopted by DoD (Application for copies should be addressed to American Society for Testing and Materials, 1918 Race Street, Philadelphia, PA 19103.) (Non-Government standa
23、rds and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the text of this document and
24、 the references cited herein (except for related associated detail specifications, specification sheets, or MS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUI
25、REMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification.
26、Fiber optic interconnection boxes furnished under this specification shalt be products which are authorized by the qualifying activity for listing on the applicable qualified products list at the time set of award of contract (see 4.4 and 6.4). 3.3 Materiats. Interconnection boxes shall be construct
27、ed of materials that will not produce toxic, corrosive, or explosive by-products and shall maintain their compliance with this specification for not less - than 20 years. Materials shall be nonmagnetic and shall not interfere or degrade the performance of the components within under all operational
28、and environmental conditions. They shall be of the lightest mass 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-2472BA bO 9999906 LLb0.572 415 m MIL-I-24728A suitable for the intended purpose and shall not interfere witti or degrade the fibe
29、r optic termination process. All speciffed materials are subject to a toxicological data and formulations review and inspection, for safety of the material, by the Government. Zinc castings shall not be used: - 3.3.1 Recovered materials. Unless otherwise specified herein, all material incorporated i
30、n the products covered by this specification shall be new. Products may be fabricated using raw materials produced from recovered bulk materials to the extent practicable if the intended use of the product is not jeopardized. The term “recovered materials“ means materials which have been collected o
31、r recovered from solid waste and reprocessed to become part of a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of partially processed, assembled, used, or rebuilt products are allowed under this specification. 3.3.2 Processes
32、. Material processes shall be in accordance with MIL-E-24142. 3.3.2.1 Castings. Castings shall be in accordance with MIL-STD-454, requirement 21. 3.3.2.2 Corrosion protection and corrosion-resistinq treatments. Unless otherwise specified in the specification sheet (see 3.11, corrosion resisting trea
33、tments shall not be applied to surfaces where contact between surfaces would cause gouging, binding, or the function of the interconnection box to be impeded. Corrosion protecting and corrosion resisting treatments shall be in accordance with MIL-STD-454, requirement 15, and as specified in M1-16400
34、. Dissimilar metals in contact with each other shall be in accordance with MIL-STD-454, requirement 16. 3.3.2.3 Finish. 3.3.2.3.1 Interior and exterior surfaces. The interconnection box interior and exterior surfaces shal be painted in accordance with MIL-E-I6400 or coated with epoxy powder in accor
35、dance with MIL-C-24712. 3.3.2.3.2 Box accessories. Box accessories shall be as specified in the individual specification shee (see 3.1). 3.3.2.4 Weldinq, structural. Welding, brazing, and similar processes used in the manufacture of enclosures shall be performed so as to withstand all required tests
36、. 3.3.3 Material safety data sheet (see 6.8). The contracting activity shall be provided a material safety data sheet (MSDS) at the time of contract award. The MSDS shall be provided in accordance with the requirements of FED-STD-313. The MSD.S shall be included with each shipment of the material co
37、vered by this specification. 3.3.4 Nonmaqnetic materials. Unless otherwise specified (see 3.1), all parts shall be of nonferrous material or a material generally considered nonmagnetic. The magnetic permeability shall be 2.0 or less after fabrication (see 4.6.9) 3.4 Design, construction, and physica
38、l dimensions. The design, construction, and physical dimensions of the interconnection box shall be as specified herein and as specified in the specification sheets (see 3.1). 3.4.1 General. Interconnection boxes may include cast or fabricated construction in which construction welding shall be in a
39、ccordance with MIL-STO-454, requirement 13. All flat sheets of metal shall be provided with a means of improving their rigidity, such that the requirements specified shall be met. All sharp edges and corners shall be broken and rounded. 3.4.2 Enclosure. Interconnecbion boxes shall be designed such t
40、hat all cables, cable components, fibers, connectors, splices, couplers, and mounting and stability supports for the above components entering, enclosed in, or exiting the interconnection box are not damaged during the servicing of the interconnection box or components or during installation of addi
41、tional components. Covers of interconnection boxes may be either hinged or removable as specified in the specification sheet (see 3.1). When hinged covers are used, they shatl be capable of being rigidly fixed in the open position for servicing of the enclosed components. Interconnection boxes that
42、weigh more than 68 kilograms shall be provided with lifting eyelets. 3.4.2.1 Degree of enclosure. Interconnection boxes shall be submersible unless otherwise specified (see 3.5.3.5). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24728A 60 9
43、999906 LLb0573 351 m points positioned to transmit loads to the supporting structure. Additional mounting requirements shall be as specified in the specificaLion sheet (see 3.1). 3.4.4 Cable interconnection interface. The types and sizes of cables, used within an interconnection box, shall be as spe
44、cified in the specification sheet (see 3.1). Fiber optic cables shall enter the interconnection boxes via cable feed-throughs (see 6.6.2). Cable feed-throughs shall not degrade the optical performance of fiber optic cables and shall be located as specified in the specification sheet (see 3.1). All t
45、ypes and sizes of fiber optic cables shall be capable of being spliced or connectorized inside an interconnection box. 3.4.5 Interconnect orqanization. Interconnection boxes shall have provisions for organizing fiber splices and fiber optic connectors, as specified in the specification sheet (see 3.
46、1), such that fiber splice organizers, optical patch panels, or connectors may be moved into serviceable positions without damage to any component, and their operational position shall minimize microbends or macrobends in any cable, optical fiber cable component (OFCC), or fiber. Unless otherwise sp
47、ecified, all buffered fibers, OFCCs, or fiber ribbons located between the input cables and the fiber organizers shall be routed along the sides of the interconnection box, and shall be guided through wire troughs or bundled with wire wraps. Unless otherwise specified in the specification sheet (see
48、3.1), fiber optic interconnection boxes shall provide interconnection (see 6.6.3) capabilities for fiber distribution. 3.4.5.1 Fiber optic splices. The type and maximum number of fiber optic splices to be used within the interconnection box shall be as specified in the specification sheet (see 3.1).
49、 3.4.5.2 Fiber optic connectors. The type and maximum number of fiber optic connectors to be used within the interconnection box shall be as specified in the specification sheet (see 3.1). 3.4.5.3 Fiber and splice orqanizers (see 6.6.4). Splice organizers shall be universal or replaceable to accommodate and protect all types of fiber optic splices, both mechanical and fusion. Splice organizers shall identify each fiber optic splice. The design shall allow the physical rearrangement of splices. The numb
