WTB (Wired Train Bus)/MVB (Multifunction Vehicle Bus) Cables


The cables are used as connecting cables to transmit digital signals inside railway rolling stocks. The communication system in a locomotive uses a wire backed bus system to the TCN standard for control and instrumentation and for diagnostics.

This bus system consists of the rail bus WTB (Wired Train Bus) and the road bus MVB (Multifunction Vehicle Bus) which are connected via redundant gateways.


  • DIN 5510-2

Cable Construction

WTB/MVB Cables Railway Cables
Conductor Stranded tinned copper conductor according to IEC 60228 class 5
Insulation Foam skin-composite PE made of inner cellular layer and outer solid skin
Cable Element Twisted pair
Core Wrapping Plastic tape(s)
EMC Screen1 Aluminium clad polyester foil
EMC Screen2 Tinned copper braid
Core Wrapping Plastic tape(s)
Outer Sheath Cross-linked oil resistant LSZH compound

Electrical Characteristics at 20℃

Nominal Cross Section/AWG mm^2 0.62/20
Maximum Conductor Resistance Ω/km 33.1
Impedance@0.5-2MHz Ω 120+/-12
Maximum Attenuation @1MHz dB/km 10
Maximum Attenuation @2MHz dB/km 15
Nominal Voltage Rating V 300

Mechanical and Thermal Properties

Minimum Bending Radius 6×OD (single); 12×OD (multiple)
Temperature Range -40℃ to +100℃ (during operation); -20℃ +50℃ (during installation)

Dimensions and Weight

Cable Code No. of cores& Nominal Conductor Cross Sectional Area Nominal Diameter of Strands Nominal Sheath Thickness Nominal Overall Diameter Nominal Weight
  No.×mm^2 No/mm mm mm kg/km
RD-WTB/MVB--02YS(ST+C)H-1P20A 1×2×0.62 19/0.2 1.2 8.3 80