An interface device is configured for interfacing one or more external devices to Ethernet Power Source Equipment PSE. The interface device includes a jack for connection to the PSE, and first and second output jacks. The first output jack provides an Ethernet power and data connection for an external device. The second output jack provides a DC power connection for an external device. A power extractor circuit provides a signature to the PSE, and provides a predefined output signal in response to receiving a power signal from the PSE. At least one delay element electrically connects the network connection jack and the first output jack, after a predefined delay from a time at which the power extractor circuit provides the output signal.