September, 2017


www.us-tech.com


Magnetic Attraction: Combining M12 Connectors with Transformers


By Jonas Diekmann, Technical Editor, HARTING Electronics T


ransformers play a major role in today’s Ethernet communi- cations technology; without them, broadband data transfer with high signal integrity would be nearly


separation, and symmetrization. Any communication based on an Ethernet protocol requires chips and other electronic devices that are very sensitive to high voltage. Since not all devices and transmission net- works in a complex, ramified system have identical potentials, galvanic isolation through the use of a trans- former provides effective component protection.


Until now, PCB cable connec- tions have been made by taking an


With the current trend in electronics to miniaturize devices and machines, connection technology also needs to shrink.


HARTING has successfully integrated chips and transformers into the connector itself.


industrial connector or a suitable jack and welding it to the PCB using through-hole contacts. Chip sets and other electronic peripherals are placed next to the jack. With the cur- rent trend in electronics to miniatur- ize devices and machines, connection technology also needs to shrink. HARTING decided it was time to integrate chips and transformers into the connector itself.


In a typical application, for Continued on page 71


Page 69


Standard M12 connector (center) flanked by two connectors with integrated transformers.


impossible. Typically, network devices and cabling sections have to be galvanically isolated from each other in order to protect nearby chips. HARTING has developed an M12 PCB connector with an inte- grated transformer. The new connec- tors are designed to be robust, save space on the board and offer the best possible signal integrity.


Classic transformers are built with a narrow frequency range opti- mized for the most efficient power transfer. Transformers for Ethernet


Thermal systems for the electronic and photovoltaic industries


Classic arrangement of transformer and peripherals.


communications technology are designed for relatively broadband data transfer with high signal quali- ty. In these applications the quality of the signal is more important than totally optimized efficiency. The pur- pose of these transformers is to ensure that the communication between two parts of an Ethernet- based system is of high quality dur- ing transfer.


Other important features of a transformer include linearity and minimized distortion. Distortions can lead to signal corruption, and as a result, the signals can no longer be read correctly by the recipient. This sort of signal corruption can lead to functional problems across an entire system or downtime in an applica- tion — the worst possible scenario.


Preserving Signal Integrity


Since these signals need to be so carefully transferred and their quality preserved, why conduct them through a complicated system of var- ious inductors? Transformers have a variety of uses in local Ethernet net- works, including for galvanic isola- tion, signal transmission, potential


For more information visit www.rehm-group.com or call + 1 770 442 8913


See at SMTAI, Booth 410


Visit us


at SMTAI September 19–20, 2017 #410


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