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EMC compliant power interface in modular connector

New additions to the Han-Modular® portfolio for machine building, mechanical engineering, robotics and transportation applications
Heiko Meier
Heiko Meier
Product Manager, HARTING Electric

The Han® Shielded Power module enablers users for the first time to transmit shielded power in a modular connector, side by side with other media. Moreover, the connector face of the Han® M12 modules enables pluggable connections for signals, industry buses or Ethernet transmission routes.


The Han® Shielded Power Modul has three power and one PE contact for the connection of typical three-phase units, two signal contacts for temperature monitoring, as in brakes and similar systems, for example, as well as a generous shield transition for the EMC compliant connection of the cable shield directly at the module. It represents an alternative to the hard wiring of shielded power lines and enables the such lines to be executed  in one housing next to other Modulen der Han-Modular®- moduleSerie for the transmission of data, signals and/or power.

Tested in our EMC laboratory

In practice-oriented applications, HARTING tested the module in the company’s EMC laboratory: while the EMC characteristics of the shield transition of the new module are weaker than in shielded cables without plug connection, they are absolutely sufficient for typical drive applications such as frequency controlled alternating motors or other loads. The module enables the pluggable execution of shielded power lines, is convenient to handle and enables the direct shield connection on the module. This results in shorter assembly times of machines, equipment and systems, whether in manufacturing facilities or at end customers.

M12 in a modular execution

The M12 format has gained widespread acceptance in machine building and mechanical engineering as a robust data interface. The M12 solution for applications in machine building, mechanical engineering and railway vehicle manufacturing is a new addition to the Han-Modular® portfolio. The Han® M12 module integrates two pluggable connectors for signals, industry buses or Ethernet transmission routes - also as different types, such as D- or X—coded version, for example – in one single module. By comparison with the modules available to date, this achieves twice the packing density. There is no need for an articulated frame and the space can be used for other functions.

New double module handles higher voltages

The Han DD® double module is a compact interface and caters to applications in robotics and automation. With this double module HARTING has created a solution for 36 Han D® contacts that combine high contact -density with high rated voltage of 400 V. Solutions available to date of the same size were only able to handle 250 V with 24 contacts., The total space savings achieved amount to an impressive 50 percent.

As Heiko Meier, Han-Modular® Product Manager at HARTING Electric commented: “In view of the electrical parameters “(10 A / 400 V) the double module is especially suited for transmitting power and signals in machines and robots. For the first time it is also possible to realize the plug connections for 3-phase alternating current motors including the feedbacks for all six axes of a robot.“

EMV shielding

An electromagnetic shield has the function of either shielding an electromagnetic field generated internally, and preventing its emission externally, or ensuring a space that is free of interference from externally impacting fields. This applies to housing shields as well as cable shields. The low-resistance connection of the shield to a ground potential is important for effective shielding in order to keep the interference voltage caused by leakage current as low as possible.

EMC Directive 2014/30/EU

The directive defines electromagnetic compatibility as “the capability of an apparatus, installation or system to operate satisfactorily within an electromagnetic environment without causing electromagnetic interference that would be unacceptable for apparatus, installations or systems operating in this environment.“ The basic protection requirements that all electrical equipment, devices and appliances placed on the market must comply with are derived from this definition. The protection requirement stipulates that on the one hand, the emitted interference must be so low that equipment in the interference environment are not unduly interfered with. This involves limiting interference sources (so-called interference suppression). On the other hand, the interferences that are expected to be impacting on the equipment (fields, interference currents or interference voltages) must not impair the functioning.  In other words, the equipment must be designed and constructed to be interference resistant.

In Germany, VDE and DKE are responsible for preparing and processing the standards. In recent times, the standards are being increasingly harmonized on international levels. Consequently, the international standards organizations such as IEC, CENELEC and CISPR are also playing a role for Germany.

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