By Eileen Harvey
CAN-Bus (Controller Area Network Bus) cables play a pivotal role in both automotive and robotics applications, serving as the backbone for communication between various electronic components. In modern vehicles, where complex systems such as engine control units, anti-lock braking systems and infotainment interfaces are interconnected, CAN-Bus cables facilitate real-time data exchange. This technology enables different modules to communicate seamlessly, which enhances vehicle performance and safety.
For instance, if a vehicle’s traction control system detects wheel slip, it can quickly relay information to the engine control unit via the CAN-Bus, prompting immediate adjustments to maintain stability. The robust design of these cables ensures reliable communication even in the challenging environments of automotive applications, which often include exposure to vibrations, temperature fluctuations and electromagnetic interference.
Whether it’s a car’s safety system preventing a collision or a robotic arm assembling components with millimeter precision, data must flow reliably and without delay. This is where CAN-Bus cables come into play.
Designed to transmit signals in harsh environments while resisting interference, CAN-Bus cables form the nervous system of modern vehicles and industrial robots. Choosing the right cable ensures system stability, long service life and consistent performance.
What is CAN-Bus?
CAN-Bus (Controller Area Network) is a communication protocol developed by Bosch in the 1980s for the automotive sector. Unlike point-to-point wiring systems, CAN-Bus allows multiple devices (nodes) to communicate over a single twisted-pair cable, reducing wiring complexity and cost.
The scalability of CAN-Bus systems also benefits robotics, as additional modules can be integrated without major redesigns, paving the way for more complex and capable robotic solutions. Overall, the versatility and reliability of CAN-Bus cables make them indispensable in the advancement of both automotive technology and robotic innovations.
Key Features:
CAN-Bus cables have four chief characteristics. First is multi-node communication, with up to 112 devices on one bus. Second is real-time performance, which is critical for safety and automation. A third key feature is that they are robust against EMI (electromagnetic interference). And a fourth characteristic of Can-Bus cables is their fault-tolerant design, ensuring operation even if one node fails.
Role of CAN-Bus Cables in Automotive Applications
Automobiles today can have between 70 and 100 electronic control units (ECUs) that manage critical functions ranging from power steering to airbag deployment. CAN-Bus cables link these ECUs to ensure seamless communication across the vehicle’s systems. They play a central role in engine management systems by controlling fuel injection and ignition timing. They also support advanced driver assistance systems such as lane assist, adaptive cruise control and parking sensors. In addition, CAN-Bus cables help maintain reliable infotainment by keeping audio, navigation and connectivity modules free from signal disruption. Electric and hybrid vehicles depend heavily on CAN-Bus communication within their battery management systems.
Tips for Extending Cable Lifespan
To extend the lifespan of CAN-Bus cables in automotive and industrial environments, it is important to use jackets that are resistant to UV exposure and oil. Flex-rated cables are the best choice for robotic arms and automated guided vehicles. Regular inspections should be carried out to check for abrasion or jacket cracking. Investing in high-quality cables from trusted brands such as TKD Kabel can also deliver long-term savings by reducing premature failures.
Role of CAN-Bus Cables in Robotics
In robotics, precision and real-time control are essential. CAN-Bus technology enables multiple robotic components to work in sync, ensuring flawless operation in factories, warehouses and research labs. In industrial robots, it coordinates multiple axes and actuators. Collaborative robots, or cobots, rely on CAN-Bus for safe, real-time communication between sensors and motors. Automated guided vehicles depend on it for navigation and collision avoidance, while medical robotics such as surgical robots require ultra-reliable communication for accurate and safe performance.
Facts about CAN-Bus
A typical luxury car can include more than 70 CAN nodes. CAN-Bus is also the backbone of OBD-II, the on-board diagnostics system present in all modern vehicles. In robotics, the use of CAN-Bus allows synchronized motion control within milliseconds, providing the speed and accuracy required in advanced automation.
Technical Requirements of CAN-Bus Cables
Not all cables are suitable for CAN-Bus applications, so meeting certain specifications is critical. The industry standard for characteristic impedance is 120 Ohms with a tolerance of ±10 percent. Low capacitance is necessary to support high-speed signal transmission. Effective shielding is also required to protect against electromagnetic interference in automotive and factory environments. Foil shielding offers lightweight protection, while braid shielding provides heavy-duty coverage with added flexibility. Twisted pairs reduce crosstalk and noise, and jacket materials such as PVC, TPE or PUR enhance resistance to oil, UV, chemicals and mechanical stress.
Cable Selection for Automotive and Robotics
When selecting CAN-Bus cables, the operating environment must be considered. High temperatures, oil or chemical exposure call for specialized jacket materials. Flexibility requirements are also important, especially for robotics that rely on cables rated for continuous motion. Distance and speed must be factored in as well. At lengths up to 40 meters, CAN-Bus supports speeds of 1 Mbps. At 500 meters, it supports 125 kbps, and at distances up to 1 kilometer, it supports 50 kbps.
Installation Best Practices
Proper installation is critical to ensure reliable CAN-Bus communication. The twisting of pairs should be maintained and not untwisted by more than half an inch at terminations. Both ends of the cable should be properly terminated with 120 Ohm resistors. Shields must be grounded to prevent electromagnetic interference buildup. Routing CAN-Bus cables in parallel with power cables should be avoided to reduce noise coupling. Finally, testing with proper tools such as CAN-Bus analyzers is essential to confirm communication stability.
Recommendations
We offer three recommendations. First, for automotive applications, use 20AWG or 24AWG stranded cables with double shielding. Second, for robotics applications, select flex-rated, PUR jacketed cables for durability. And third, for industrial settings, opt for UV, oil and chemical resistant options.
CAN-Bus cables are the lifeline of modern vehicles and robotic systems, ensuring reliable, real-time communication in demanding environments. By understanding their role, selecting the right specifications and following installation best practices, engineers can guarantee system reliability and longevity.
Whether you’re designing next-generation autonomous vehicles or deploying robotic automation in factories, choosing high-quality CAN-Bus cables from TKD Kabel is a smart investment in performance and durability.
About L-com
Explore the full range of TKD Kabel through L-com. We’ll fill your orders fast, with same-day shipping on all qualified, in stock, online orders received Monday through Friday before 5 p.m. EST. For TKD-related inquiries, connect with our U.S-based TKD expert Eileen Harvey at eharvey@infiniteelectronics.com.
