We use these a lot. Nice thing for us is that the ECB's (Electronic Circuit Breaker) connect to a PLC with one digital output and up to two digital inputs on the PLC. Through this feature we can remotely monitor the status of various 24VDC circuits in a control panel. A nice feature for customer support on systems around the globe. We can see the voltage and check the state of every channel. Some models also report amps per 24VDC circuit back to the PLC, which is even better.