A compatible interface for an installation to control household machines that comprises an omnibus line having at least two first line wires used for a supply current, information signals being transmitted on the two first wires and/or on two second line wires, wherein said interface comprises: a circuit to recognize whether information signals are sent on the two first wires or on the two second wires and to transmit a reception identification signal to a household machine; and a current regulation circuit connected to the two first wires to give a stabilized current supply even if information signals are transmitted on the two second wires. Applications include control of household (home automation), industrial, or professional installations.
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