Abstract: The present disclosure relates to an apparatus for emulating removal and insertion of a plug-in device, including a detection signal input and a detection signal output for a detection signal of the plug-in device, a control signal input for a control signal from a host system, and a unit which is constructed such that in a first state of the switch the detection signal input and the detection signal output are connected and in a second state of the unit the detection signal input and the detection signal output are disconnected and wherein the state of the unit depends on the control signal. The unit preferably includes a switch.