A plug connector includes a housing, a through-opening for a cable, and a seal adapted to seal in the area of the through-opening. For multiple versions of the systems management environment, a transformation pipeline process can be used by a \u201cmaster\u201d node to transform the configuration data multiple times for each version of the environment, until the configuration data has the format of the intended recipient \u201cslave\u201d node. Each predetermined service is programmed to receive a wireless message from a respective electronic apparatus, to execute a predetermined elaboration, and to return a result to the respective electronic apparatus. The optical position indicator is typically light emitting diodes and communicates with corresponding measurement sensors across a wireless optical link. The temperature of an electronic system is measured and is compared with the defined temperature ranges to determine whether it enters into a new range. The loop presser portion 14 presses the yarn 22 during the knitting.