1、 MIL-DTL-49285/19A 31 March 2010 SUPERSEDING MIL-C-49285/19 19 October 1989 DETAIL SPECIFICATION SHEET CABLE, SPECIAL PURPOSE, ELECTRICAL, TWO PAIRS OF 20 (7 X 28) AWG, ONE PAIR INDIVIDUALLY SHIELDED This specification is approved for use by all Departments and Agencies of the Department of Defense.
2、 The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-49285. FIGURE 1. Cable illustration. AMSC N/A FSC 6145 INCH-POUND Inactive for new design after 16 June 1997. Provided by IHSNot for ResaleNo reproduction or networking permitted withou
3、t license from IHS-,-,-MIL-DTL-49285/19A 2 Engineering information: see table I. Note: Not for aerospace use. TABLE I. Description, electrical. Electrical characteristics Requirements Nominal capacitance between conductors Nominal capacitance between the conductor and the shield with one conductor t
4、ied to the shield Continuous working voltage Shield dc resistance 60 pF/ft (picofarads/foot) 99 pF/ft 350 V rms maximum between conductors 14 ohms/1,000 feet maximum TABLE II. Description, physical. Components Construction details Number of pairs Conductor type and wire size Conductor stranding Cond
5、uctor insulation Conductor insulation thickness 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 Two pairs one pair individually shielded Stranded tinned co
6、pper 20 AWG 7 X 28 AWG Polyvinyl chloride 0.015 inch nominal thickness Stranded tinned copper 22 AWG 16 X 34 AWG Polyvinyl chloride 0.028 inch 0.242 inch maximum outside diameter Not applicable 2,000 pounds per square inch minimum 150 percent minimum 6.8 twists per foot 10 percent Cabled pair orient
7、ation: The position of the red and green pair shield shall determine the rotation direction for pair location (see figure 1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-49285/19A 3 REQUIREMENTS: Design and construction: (see table II): S
8、hield color code. The shield color shall be blue. 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 the shield is to be complete with no aluminum available for con
9、tact. 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. Cable temperature rating. The cable temp
10、erature rating shall be -20C to +80C. Flammability. The cable shall pass UL 2556 flame test requirements. Shield integrity test.* Frequency Response * 100 kHz 115 dB below reference 500 kHz 104 dB below reference 1 MHz 95 dB below reference 5 MHz 77 dB below reference 10 MHz 67 dB below reference 15
11、 MHz 62 dB below reference 20 MHz 58 dB below reference 25 MHz 54 dB below reference 30 MHz 50 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 occur between 40 and 70 MHz. At 100 MHz: At l
12、east 43 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 82 5. Part or Identifying Number (PIN): The PIN shall be M49285/19. Changes from previous issue. The margins of this sp
13、ecification 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 cautioned to evaluate the requirements o
14、f this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Referenced documents. This document references MIL-DTL-49285 and UL 2556. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
15、MIL-DTL-49285/19A 4 CONCLUDING MATERIAL Custodians: Preparing activity: Army CR DLA - CC Navy SH Air Force 85 DLA - CC Review activities: Air Force 99 (Project 6145-2009-004) Army MI 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 https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
