1. Via LEDs: When the device is running and four channels are active, the green LED is illuminated. Non-critical errors such as minor overcurrents or an undervoltage at the device input are displayed as warnings by the yellow LED, while critical faults such as a circuit shutting down are indicated by the red LED.

2. Via display: The output currents of the 4 channels are indicated continuously on the display along with the input voltage. The device features an integrated fault memory for self-diagnostics in the event of fault conditions.

3. Via signal outputs: There are four active signal outputs on the electronic circuit breakers which function as watchdogs. Direct digital signal processing is used for the outputs. Output 1 is linked to an isolated signal contact on the underside of the 787-860 and 787-862 devices. It can be user-defined via free 759-860 Software even to cover multiple fault conditions.

4. Via interface: The electronic circuit breakers can communicate with a PC or control system via the integrated serial interface. The free 759-860 Software is not only used to configure the current or tripping characteristics of individual channels, but also for visualization and fault diagnostic purposes. The 787-890 Serial Communication Cable is available as an accessory for connection to the RS-232 interface.