| 主权项 |
1. A multifunctional I/O apparatus, comprising:
one connection terminal with two connections; and an electronic circuit, which with the assistance of a plurality of settable operating states detects an active input signal or passive input signal applied on said two connections of said connection terminal or controls/switches an externally driven load, wherein: said electronic circuit comprises: at least one switch element, which is so operable by a first control signal of a logic unit that it short circuits or isolates said two connections of said connection terminal; a signal generator, which is so operable by a second control signal of said logic unit that in the presence of the active input signal or passive input signal on said two connections of said connection terminal it generates a status signal and forwards such to said logic unit; an energy source, which is so operable by a third control signal of said logic unit that in the presence of the passive input signal on said two connections of said connection terminal, it provides energy required for operation of the signal generator, a protective apparatus, which is connected between the signal generator and the energy source; and said logic unit, which dependent on the respectively set operating state of said electronic circuit distinguishes between a first operating state, a second operating state and a third operating state and, with the assistance of the first control signal, the second control signal and the third control signal, activates said switch element, the signal generator and the energy source in accordance with the set operating state. |
