Manufacturing engineers can feel the frustration of a production line being shut down due to a motor controller malfunction, but repairing this controller requires dismantling dozens of connecting wires. Technicians search for circuits in the wire harness, hoping to find the correct one among hundreds of wires with similar appearances. Originally, it only took a few minutes to complete, but it took several hours. This situation highlights the challenges posed by electrical connections in industrial environments. Hardwired systems initially appear to be cost-effective, but they can cause hidden inefficiencies that worsen over the device's lifecycle, and the essence of the problem lies in the rigid nature of hard wired connections. Fortunately, modular connector solutions (Figure 1) can now be adopted, which can meet constantly changing requirements while maintaining industrial grade reliability.
HARTING Han-Modular ® Modular connector system
Figure 1: Han Modular ® Modular connector system. (Image source: HARTING)
The origin of standardized industrial connection technology
In 1945, Wilhelm HARTING realized that post-war industrial development required connection solutions that were completely different from existing designs. Starting from a small repair shop in Minden, Germany, HARTING developed a product later known as Heavy Duty Connector (HDC), establishing principles that still influence industrial connection design today.
Compared to the circular design that initially dominated military and aerospace applications, the construction of rectangular connector design has achieved a breakthrough. The rectangular structure improves the space utilization of industrial control panels and achieves higher contact density within a standardized footprint. The Han connector series was launched before the industrial boom of the 1960s, demonstrating how sturdy and durable standardized connections can handle multiple media and withstand harsh factory environments.
This historical accumulation is extremely important because Han Modular technology directly inherits proven principles. This is not about reinventing basic concepts, but about combining proven designs with the latest materials, manufacturing technologies, and integration capabilities.
Deconstructing modular connection system design
HARTING's Han Modular technology adopts a modular construction approach. Engineers can select individual modules based on specific requirements of media such as power, signals, data, air, etc., and combine these building modules into protective enclosures designed specifically for specific environments.
Han Modular modules can handle specific media within connector components, for example, power modules can provide 16 A to 200 A current for heavy-duty applications, signal modules can support low-voltage control circuits, and communication modules for Ethernet, fieldbus, or fiber optic connections. Engineers can combine these different types of modules within the same assembly framework, eliminating the need to install connectors separately for each medium. The protective casing provides mechanical support and environmental sealing for module combinations, with standardized casings ranging from compact Han 6B to Han 48B configurations (Figure 2), suitable for heavy-duty/multi-media requirements.
HARTING Han 48B through plate installation shell
Figure 2: Example of Han 48B through plate installation shell. (Image source: HARTING)
According to the severity of the application, a graded sealing structure is adopted for environmental protection. The basic IP65 protection level can prevent dust infiltration and water ingress, which is common in most production facilities. On the other hand, Han Modular connectors perform stronger IP69K specifications and can withstand high-pressure flushing procedures required for food processing and pharmaceutical production.
The Han Modular connector integrates multiple safety features to eliminate connection errors. The mechanical key control system uses uniquely shaped guiding elements that only allow correctly matched male and female heads to be connected together. This physical design can prevent technicians from connecting incompatible connectors, which is a common wiring error in hard wired connections. The key control system can directly and completely eliminate misconnections without relying on wiring labels or circuit diagrams that become blurry over time.
HARTING and DigiKey Collaboration: Launch of Han Configurator
The connector specifications have brought many challenges to the engineering workflow. Engineers must personally cross reference component specifications from multiple data sheets, confirm environmental ratings, and verify compatibility requirements for each connector. This process is time-consuming and labor-intensive, which can affect project progress and cause selection errors.
To address this issue, DigiKey and HARTING have jointly launched an integrated design tool that can automatically verify and select components. Engineers use Han Configurator ® The configurator can input system requirements such as medium type, rated current, and protection level, and receive real-time feedback information on component compatibility and supply status. The configurator adopts rule-based selection logic to prevent incompatible combinations and provide alternative solutions when their choices conflict. This configurator can also display configured components from multiple perspectives, allowing engineers to verify mechanical compatibility and cable routing requirements before procurement.
The Han Configurator can also generate complete documents, such as a bill of materials containing current prices and supply status. Integrating directly with DigiKey's procurement system helps eliminate manual creation of parts lists and ordering tasks. Engineers can use post comparison tools to evaluate modular and hard wired alternatives or pre configured libraries as a starting point for cross industry applications.