DLA MIL-DTL-49285 32 A-2010 CABLE SPECIAL PURPOSE ELECTRICAL (LOW NOISE) ONE INDIVIDUALLY SHIELDED PAIR OF 24 (19 X 36) AWG.pdf

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1、 MIL-DTL-49285/32A 10 February 2010 SUPERSEDING MIL-C-49285/32 19 October 1989 DETAIL SPECIFICATION SHEET CABLE, SPECIAL PURPOSE, ELECTRICAL, (LOW NOISE) ONE INDIVIDUALLY SHIELDED PAIR OF 24 (19 X 36) AWG This specification is approved for use by all Departments and Agencies of the Department of Def

2、ense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-49285. Engineering information: See table I. Note: Not for aerospace use. TABLE I. Description, electrical. Electrical characteristics Requirements Nominal capacitance between cond

3、uctors Nominal capacitance between the conductor and the shield with one conductor tied to the shield Continuous working voltage Shield dc resistance 30 pF/ft (picofarads/foot) 58 pF/ft 200 V rms maximum between conductors 21.0 ohms/1,000 feet maximum AMSC N/A FSC 6145 INCH-POUND Inactive for new de

4、sign after 16 June 1997. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-49285/32A 2 TABLE II. Description, physical. Components Construction details Number of pairs Conductor type and wire size Conductor stranding Conductor insulation Conduc

5、tor insulation thickness Noise reducing tape Drain wire type and size Drain wire stranding Jacket material Jacket thickness Finished cable diameter Cable style (UL) Tensile strength (jacket) Elongation (jacket) Overall cabling lay length One individually shielded Stranded tinned copper 24 AWG 19 X 3

6、6 AWG Polypropylene 0.008 inch nominal thickness Nylon cloth tape, carbon impregnated Stranded tinned copper 24 AWG 19 X 36 AWG Polyvinyl chloride 0.020 inch 0.142 inch maximum outside diameter Not applicable 2,000 pounds per square inch minimum 150 percent minimum 16.0 twists per foot 10 percent RE

7、QUIREMENTS: Design and construction: (see table II): Shield color code. The shield color shall be blue. Noise reducing tape. The noise reducing tape is carbon impregnated nylon cloth tape. The tape is located beneath the foil shield over the insulated conductors. Thickness: .0035 inch to .004 inch.

8、Weight: 11 pounds per 100 square yards Material: 50 denier nylon 100 x 7 threads per inch Coating: Semiconductor lacquer Breaking strength: 50 pounds per inch width minimum Elongation: 20 percent Color: Black Conductivity: 5,000 ohms per unit square maximum value Location: Between the insulated cond

9、uctors and the polyester aluminum shield Drain wire location. The drain wire is to be spirally located between the noise reducing tape and the aluminum foil shield, and is to be in continuous contact with the aluminum surface of the foil shield and the noise reducing tape throughout the cable. Provi

10、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-49285/32A 3 Shield location and orientation. The polyester aluminum shield is to be located on the outer circumference of the pair, with the aluminum foil side outward. Insulation on the interior of

11、the shield is to be complete with no aluminum available for contact. Cable temperature rating. The cable temperature rating shall be -20C to +80C. Shield integrity test.* Frequency Response * 100 kHz 110 dB below reference 500 kHz 102 dB below reference 1 MHz 96 dB below reference 5 MHz 79 dB below

12、reference 10 MHz 71 dB below reference 15 MHz 65 dB below reference 20 MHz 60 dB below reference 25 MHz 56 dB below reference 30 MHz 52 dB below reference * Any two readings may deviate to a value of 0.9 times the stated limits. * All values are a minimum numerical value. Fixture resonance will occu

13、r between 40 and 70 MHz. At 100 MHz: At least 36 dB below reference. Crosstalk test limits. Crosstalk testing is not required for this configuration. Durometer hardness. The cable jacket shall have a “Shore A” hardness of 77 5. Part or Identifying Number (PIN): The PIN shall be M49285/32. Changes fr

14、om previous issue. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are

15、 cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-49285/32A 4 Referenced do

16、cument. This document references MIL-DTL-49285. CONCLUDING MATERIAL Custodians: Preparing activity: Army CR DLA - CC Navy SH Air Force 85 DLA CC Review activities: Army MI (Project 6145-2009-028) Air Force - 71 DLA IS NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change. You should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-