Diagnostic building block for connecting to an installation bus system

摘要

The device (1) is connected to an installation bus system via a bus connection terminal (7) and has at least one display unit (3-5) for displaying operating states and/or bus system faults. Each display unit associated with a monitored bus function is connected via an evaluation unit to at least one floating switch contact (2). The evaluation unit detects the bus voltage level, evaluates it and passes it to the display unit and/or to the bus (8). AN Independent claim is also included for the following: (a) a method of indicating, forwarding and evaluating bus functions.