Specialized Bus Cables for Rail Vehicle Communication

The rapid advancement of computer network technology has profoundly reshaped the landscape of modern railway transportation and train control. With breakthroughs in China’s EMU, high-speed rail, and urban rail transit technologies, deploying a stable and reliable train communication network has become core to ensuring safe and efficient operations. This requires building efficient, dependable data channels inside and outside the vehicle for exchanging control commands and status information.

As the “nerves” and “blood vessels” connecting all system units, rail vehicle bus cables form the lifeline of the communication network. Their anti-interference performance and safety directly determine the stability of the entire communication system. Meanwhile, network patch cords (Ethernet cables) optimized for rail transit applications serve as auxiliary connecting components. Together with specialized buses including MVB, WTB, and CANBus — which support train-level, vehicle-level, and device-level communications — they form the backbone of the modern rail communication network.

MVB is a fieldbus for intra-consist data communication, enabling real-time transmission of time-critical control signals. It is specially designed for real-time control data exchange in the vehicle-level TCMS (Train Control and Management System). The technology is standardized by the IEC in IEC 61375, with further specifications provided by the International Union of Railways in UIC Leaflet 556.

One of Zhaolong's Rail Vehicle Bus Cables

WTB is a fieldbus dedicated to data communication between railway vehicles, used to establish train-level networks for temporary train consists. It transmits critical train-level control commands and status information in real time. Its key feature is “plug-and-play” self-configuration: when the train consist changes, it automatically identifies the vehicle topology and reconfigures the network to maintain uninterrupted communication.

One of Zhaolong's Rail Vehicle Bus Cables

One of Zhaolong's Rail Vehicle Bus Cables

Technical Advantages and Application Practice of Zhaolong Rail Vehicle Bus Cables

Since its founding in 1993, Zhaolong Interconnect has focused on R&D and manufacturing of data cables and connectivity components. As a full member of the China Communications Standards Association and a drafting unit of national data cable standards, the company has developed a complete series of MVB/WTB/CANBus vehicle bus cables that fully meet the stringent requirements of rail transit.The company’s rail transit bus products have obtained CRCC certification, and all indicators fully comply with standards including EN 45545-2 and TJ/CL 313.

• Excellent anti-interference capability: Dual shielding structure (aluminum foil + tinned copper braid), effectively resisting external electromagnetic interference and ensuring signal integrity in complex rail electromagnetic environments.

• Wide environmental adaptability: Operating temperature range from -40°C to 80°C, suitable for harsh environments from cold outdoor areas to high-temperature zones inside rolling stock.

• Reliable industrial-grade protection: Fire performance complies with EN 45545-2. The sheath material is oil-resistant, acid- and alkali-resistant, corrosion-resistant, halogen-free and low-smoke.

The company’s rail transit products have been successfully applied in key domestic projects including Beijing Metro, Xi’an Metro, Guangzhou Metro, and Suzhou Metro, as well as in international projects such as the German railway system, supporting reliable operation of train data transmission systems.