Master-slave communication system with standby mode

摘要

The application describes a master-slave communication system, in particular a PSI5 communication system, with at least one slave user, at least one master user and a communication connection between the slave user and the master user. In this case, the slave subscriber is supplied in a normal operating mode by the master subscriber with a supply voltage between a lower voltage threshold and an upper voltage threshold via the communication connection. In addition to the normal operating mode, the master-slave communication system has a standby operating mode in which the master subscriber supplies the slave subscriber with a standby voltage below the lower voltage threshold via the communication connection.