3M™ Round, Shielded/Jacketed, Disc. Wire Cable
28 AWG Stranded, Twisted Pair, PO/PVC 3647B Series
• IEEE 1284 Compliant - 36 conductor
• Twisted pairs reduce crosstalk in balanced drive
     applications
• Wires are color coded for easy identification
• Meets external wiring requirements of National
     Electrical Code, Article 725 (CL2)
• UL listed for US and Canadian markets
• Dual shielding provides 35 db average shielding
     effectiveness
• See Regulatory Information Appendix (RIA) for
     chemical compliance information
     (RIA E1 & C1 apply)
　

Physical
Jacket Material: Polyvinyl Chloride (PVC)
Color: Beige
Primary Material: Polyolefin (PO)
　

Marking:
Standard: (UL) CL2 75C 28 AWG 3M XX
                  C AWM IIA/B 80C 150V FT1 EU < 50V IEEE 1284 compliant
                  (where XX may be MR, NU or NW)
Conductors: 28 AWG 7 × 36 [ 7 × 0.127 ] Tinned Stranded Copper
Shielding: 0.001 [ 0.03 ] Thick Aluminum/Polyester Film Foil and
                   90% Coverage Tinned Copper Braid
Electrical
Voltage Rating: USA: N.E.C. 725 CL2 Canada: 150V EU: < 50V
Insulation Resistance: (Primary Cable) > 1 × 1010 Ω/10 ft. [ 3 m ]
Characteristic Impedance: Unbalanced Balanced 63 Ω 100 Ω
Capacitance: 24.2 pF/ft [ 79.4 pF/m ] 15.3 pF/ft [ 50.2 pF/m ]
Inductance: 0.10 μH/ft [ 0.33 μH/m ] 0.15 μH/ft [ 0.49 μH/m ]
Propagation Delay: 1.54 ns/ft [ 5.05 ns/m ] 1.54 ns/ft [ 5.05 ns/m ]
Velocity of Propagation: 66% 66%
Note: Unbalanced is measured between ground-signal-ground conductors, with shield grounded. Balanced is measured between signal conductors within a pair, with the shield floating.
　

Environmental
Temperature Rating: USA: CL2; 75°C Max Canada: 80°C
Flammability Rating: USA: N.E.C. 725, CL2 Canada: FT1

UL File No.: E118773, Power Limited Circuit Cable; CL2