| 摘要 |
<p>An addressable node unit (30) has connections (15a, 15b, 16) for at least two lines (17, 18a, 18b) via which the node unit (30) can be addressed. The connections (15a, 15b, 16) are connected to a circuit (14) which evaluates an addressing signal. The node unit (30) has at least one power source (4, 22) which can be supplied with power via at least one of the lines (17, 18a, 18b). A switch (25) is provided in the path between the evaluating circuit (14) and the corresponding line connection (15a, 15b), said switch (25) has to be opened after an addressing process so that the power supply of the evaluating circuit (14) is ensured by the at least one power source (4, 22) after the addressing.</p> |
