Monitoring
The current per output is monitored by the selectivity modules; if the set threshold of the output is? exceeded, the output is? switched off according to a predefined time-current characteristic curve. In addition, the supplying 24 V input voltage is constantly being monitored. As soon as this voltage threatens to fail, the path with a higher current than the set threshold is? disconnected immediately. All other feeders continue to be supplied without interruption.

Signaling
Signaling of the faulty feeder takes place by the LEDs on the device as well as via group signaling contact or single-channel signaling. The selectivity module with single-channel signaling outputs the status of the 4 outputs cyclically by means of a serial code which can be read in by a digital PLC input.

Free function blocks for SIMATIC S7-300/400/1200/1500 for STEP 7 and TIA Portal as well as SIMOTION CPUs with SIMOTION SCOUT are available for evaluation. This enables simple integration into the S7 diagnostics and host control or HMI systems.

More information, as well as the function blocks for download, can be found at:

SIMATIC S7:
http://support.automation.siemens.com/WW/view/en/61450284

SIMOTION:
http://support.automation.siemens.com/WW/view/en/82555461

Connection and disconnection of the outputs
During device startup you can select between simultaneous connection of all outputs as well as sequential connection or load-dependent connection of the outputs (to reduce the peak inrush currents).

Each output can be manually connected and disconnected on the device (for example, for commissioning or service). Disconnected outputs can be connected by means of remote reset (24 V input). A requirement is that the outputs were not disconnected from the device manually.