Coriant Oy

Ian Leiman

Heikki Laamanen

Petri Kohonen

Antti Holma

Equipment including at least one plug-in unit and a body device for receiving the plug-in unit is presented. The plug-in unit includes a mechanical structure () enabling the plug-in unit to be locked in its operating position with respect to the body device with a fastening element () that can be, for example, a fastening screw. The plug-in unit further includes a sensor circuit () having first electrical properties when the fastening element is in the position locking the plug-in unit in the operating position and otherwise different electrical properties. The equipment includes a monitoring circuit () for generating a signal indicative of a difference between the prevailing electrical properties of the sensor circuit and the first electrical properties, the signal being indicative also of correctness of the installation of the plug-in unit. Thus, the correct installation of the plug-in unit can be electrically indicated and monitored.

Equipment and a plug-in unit of the equipment

Equipment including at least one plug-in unit and a body device for receiving the plug-in unit is presented. The plug-in unit includes an electrically conductive structure () having at least one surface area capable of forming a capacitive coupling with a surface area of an electrically conductive part () of the body device when the plug-in unit is inserted in the body device. The equipment further includes a monitoring circuit () for generating a signal indicative of electrical properties of a measurement circuit including the capacitive coupling and at least one galvanic contact provided by electrical connectors of the plug-in unit and the body device. The generated signal is also indicative of correctness of the installation of the plug-in unit. Thus, the correct installation of the plug-in unit can be electrically indicated and monitored.

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Espoo, Finland

Ian Leiman