Product Hierarchy
Product Hierarchy

9V28034 - Flat Vari-Twist Cable 9V280 Series, #28-34c, .050" Pitch


Belden PVC Vari-Twist series was designed to reduce crosstalk in the balanced mode by twisting the pairs, but can be mass-terminated in the flat sections with standard IDC connectors.

Physical Characteristics (Overall)

Conductor
AWGStrandingMaterialConstruction n x DNo. of Pairs
287x36TC - Tinned CopperStranded17
Conductor Count: 34
Insulation
MaterialNominal Wall Thickness
PVC - Polyvinyl Chloride0.018 in
Color Chart
NumberColor
1Brown/Tan
2Red/Tan
3Orange/Tan
4Yellow/Tan
5Green/Tan
6Blue/Tan
7Purple/Tan
8Gray/Tan
9White/Tan
10Black/Tan
Over 10 pairBrown/Tan
Red/Tan
Orange/Tan
Yellow/Tan
Green/Tan
Blue/Tan
Purple/Tan
Outer Shield Material
Material
Unshielded
Outer Jacket Material
MaterialNominal Wall Thickness
Clear PVC Substrate0.042 in

Construction and Dimensions

Cond Spacing Center-Center Flat Section: .050 +/- .005 in
Cond Spacing Center-Center Outside: 1.65 +/- .015 in
Substrate Thickness and Material: 0.01
Twisted Pair Spacing Center-Center: 0.1
Flat Section Center to Center Spacing: 20 +/- .50
Overall Flat Section Length: 2 +.5/- 0 in
Overall Twisted Length: 18 in
OuterJacket1, Nominal Width: 1.726 in
OuterJacket1, Nom Thick Flat Section: .042 +/- .003 mm
OuterJacket1, Nom Thick Twisted Section: 0.08 mm

Electrical Characteristics

Conductor DCR
Nominal Conductor DCRNominal Conductor DCR Conductor Resistance
68.2 Ohm/1000ft68.2 Ohm/1000ft
Capacitance
ElementNom. Capacitance Conductor to Conductor
@ 1 kHz20 pF/ft
@ 1 MHz16 pF/ft
Inductance
ElementNominal Inductance
@ 1 MHz0.24 µH/ft
Impedance
Nominal Balanced Characteristic Impedance []Nominal Characteristic ImpedanceNominal Characteristic Impedance DescriptionNominal Unbalanced Characteristic Impedance
115 Ohm115 OhmBalanced100 Ohm
110 OhmUnbalanced
High Frequency (Nominal/Typical)
Frequency [MHz]Nom. Insertion Loss
10 MHz3.5 dB/100ft
20 MHz5.5 dB/100ft
30 MHz7.2 dB/100ft
40 MHz8.8 dB/100ft
50 MHz10.2 dB/100ft
60 MHz12 dB/100ft
70 MHz13 dB/100ft
80 MHz14.2 dB/100ft
90 MHz15 dB/100ft
100 MHz16 dB/100ft
Delay
Nominal DelayNominal Velocity of Propagation (VP) [%]
1.6 ns/ft64 %
Balanced Crosstalk
DescriptionStart Frequency [MHz]Stop Frequency [MHz]dB Suppression
10 ft. sample length10 MHz100 MHz35 dB
Unbalanced Crosstalk
ElementTypical Unbalanced NEXT %Typical Unbalanced FEXT %Typical Cross Talk Pulse Rise Time (ns)
10 ft. sample length all grounds connected together.5.85.23 ns
10 ft. sample length all grounds connected together.43.25 ns
10 ft. sample length all grounds connected together.2.52.87 ns
High Freq
Frequency [MHz]
10 MHz
20 MHz
30 MHz
40 MHz
50 MHz
60 MHz
70 MHz
80 MHz
90 MHz
100 MHz
Current
Max. Recommended Current [A]
Per conductor @ 20°C: 1 A
Power Rating
Frequency [MHz]
5 MHz
Voltage
Dielectric Withstand VoltageUL Voltage Rating
2,000 V RMS300 V RMS
Electrical Characteristics Notes: Typical Balanced Crosstalk on 10 ft sample from 10 to 100 MHz: 35 dB

Temperature Range

Operating Temp Range: -20°C To +105°C

Mechanical Characteristics

Bulk Cable Weight: 51 lbs/1000ft
Min Bend Radius/Minor Axis: 1.25 in

Standards

UL Rating: UL AWM Styles 1731, 2693, & 2697
UL AWM Style: 1731, 2693, 2697

Applicable Environmental and Other Programs

EU Directive 2000/53/EC (ELV): Yes
EU Directive 2003/11/EC (BFR): Yes
EU Directive 2011/65/EU (ROHS II): Yes
EU Directive 2012/19/EU (WEEE): Yes
EU Directive 2015/863/EU: Yes
EU Directive Compliance: Yes
EU CE Mark: Yes
EU RoHS Compliance Date (yyyy-mm-dd): 2005-10-01
CA Prop 65 (CJ for Wire & Cable): Yes
MII Order #39 (China RoHS): Yes

Flammability, LS0H, Toxicity Testing

UL Flammability: VW-1
UL voltage rating: 300 V RMS

Plenum/Non-Plenum

Plenum (Y/N): N

Part Number

Variants
Item #ColorUPCLengthFootnote
9V28034 000H100None612825222156100 ftE
Footnote: E - MAY CONTAIN MORE THAN 1 PIECE. MINIMUM LENGTH OF ANY ONE PIECE IS 25'.

Product Notes

Notes: 18" of twisted pairs and 2" of flat section. The transition area is included in the twisted length to assure a full 2 inches of flat termination area.

History

Update and Revision: Revision Number: 0.235 Revision Date: 08-22-2019
Date: 2005-10-01
No accessories are available for this product