An unbalance correction device of a high speed rotary apparatus which can prevent the lowering of productivity in the production line of a high speed rotary apparatus while reducing variation in the posture of a workpiece supported by a jig and suppressing vibration of a member for securing the workpiece to the jig, and can enhance the precision of unbalance correction. None of the plurality of antenna elements is configured as a loop antenna element. of 20-50 mNm, as well as a multilayer coat obtained by the production method. Application will typically be in a CATV network employing center core powering or Siamese powering. If an anomaly occurs in the runaway monitoring, the external checksum diagnosis, and a checksum interval, parts of electric loads are cut off of power supply by load power relay. The expansion circuit can electrically couple the first expansion terminal to access terminal.