In an EC motor, comprising a motor electronics, a signal input or a signal output, and an optocoupler for the galvanically isolated transmission of a useful signal between the motor control unit and the signal input or the signal output, the intention is to reliably determine the degradation of the optocoupler and to improve the service life of the EC motor. 1 to 50 parts by weight of an organosilicate andor its condensates per 100 parts by weight of a resin solid content in the coating composition, and 0. There may be two raised portions located approximately 120\xb0 apart from each other and designed to register with two anterior trigones of the mitral valve annulus. An interposer structure is disposed between the layers and provides an interposer lateral surface upon which a conductive layer interconnect trace is defined to create an electrical connection between predetermined access leads on each of the layers.