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

Application

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.

 

Standards

• DIN 5510-2

 

Construction

• Conductors: 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	mm²	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 No.×mm²	Nominal Diameter of Strands No/mm	Nominal Sheath Thickness mm	Nominal Overall Diameter mm	Nominal Weight kg/km
RD-WTB/MVB--02YS(ST+C)H-1P20A	1×2×0.62	19/0.2	1.2	8.3	80