The present invention relates to an interface circuit for intermediate connection between a logic circuit and a power circuit, having a supply connection for connection to a power supply, contains two logic connections, which are configurable as logic input or logic output, and two power connections, which are configurable as power input or power output, and a configuration unit for the corresponding configuration, wherein the power input can be read by the logic output and the power output can be driven by the logic input.The present invention further relates to an interface module, having at least two power connections, contains at least one interface circuit, the power connections of which interface circuit are routed to the power connections of the interface module.