The development of the K- and S-coding was necessary because the continual miniaturization of entire devices has not only influenced the data and network technology, but also the necessary drive technology. With three power contacts and one PE for the S-code, and four power contacts and one PE for the K-code, it can safely transmit 7 kW at 630 V and 12 A, transmitting a lot of power in a very compact interface. In order to pack such high-power specifications in a compact M12 housing, special attention has to be paid to clearance and creepage distances, as well as sufficient user protection. This is accomplished using a PE contact attached directly to the housing. It is designed as a leading contact in the mating face so that it can dissipate any voltages and even prevent a flashover onto the housing or between contacts. The K- and S-coded products are robust and designed for IP65/67 environments. They are shock- and vibration-proof according to IEC 61373, and have a temperature range of -40°C to +125°C.