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.

Standard

• DIN 5510-2

Cable Construction

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	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.×mm	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