| 摘要 |
The invention relates to a switching device (<bold>9</highlight>) for an engine controller (<bold>7</highlight>) that permits reliable remote inputting of an item of binary selection information. For this purpose, in the switching device (<bold>9</highlight>) a signal voltage (<bold>8</highlight>) is applied to precisely one of three signal outputs (<bold>6</highlight><italic>a</highlight><bold>, 6</highlight><italic>b</highlight><bold>, 6</highlight><italic>c</highlight>) via a switch element (<bold>1</highlight>). The engine controller can then check the signal inputs and interpret the presence of the signal voltage at precisely one signal input as a logic value of the binary information or an intended neutral setting. All of the states in which a signal voltage is not present at precisely one signal input (<bold>6</highlight><italic>a</highlight><bold>, 6</highlight><italic>b</highlight><bold>, 6</highlight><italic>c</highlight>) can be detected as faults, as a result of which short circuits and line interruptions can be detected.
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