Coupling device for signal technology components of trackside railway safety system with identical setting stages for control and monitoring of components of external installation with line short-circuit detection

摘要

The coupling device is used between an internal installation and an external installation (3), with identical setting stages (1a,1b) used for control and monitoring of the components of the external installation, having setting elements for switching the components and monitoring elements for evaluating the contact currents. Each setting stage has a switch for status-dependent provision of a positive or negative DC potential (9), a detector (10) monitoring the amplitude and polarity of this potential.