Patent ID: 8937453
Filing Date: 2015-01-20
Classification: G05B,H02J

Abstract:
1. A supply unit for supplying an electrically operated device with electrical power and/or an electrical signal by connector elements for releasably contacting dedicated connectors of the electrically operated device, the supply unit comprising: a measuring device for measuring parameters, which parameters are suitable for determining the presence of an external capacitance electrically interconnected between one connector element and another connector element of the connector elements of the supply unit, a pulse generator configured to output a series of temporally spaced apart pulses to the connector elements, the output pulses having a characteristic output shape, wherein in response to application of the output pulses across the external capacitance of the electrically operated device, transforms the output pulses into reply pulses of a characteristic reply shape, wherein the measuring device determines whether the reply pulses are of the characteristic reply pulses, wherein power is supplied in response to a plurality of reply pulses of the characteristic reply shape, and wherein the parameters include a time dependent current and a time dependent voltage.