| 摘要 |
<p>A circuit configuration for actuating a safety relay (1) such as the main relay of an electronically controlled brake system of an automotive vehicle at least has two transistors (T1, T2) connected in series and a monitoring circuit (5) which will urge the transistors into the non-conductive state if there is a defect or trouble. The operativeness of the transistors (T1, T2) or of the monitoring circuit (5) will cause the safety relay (1) to be switched off. The monitoring circuit (5) has a voltage divider, which is connected to auxiliary voltage (UH), switches and whose middle branch is coupled with the switches and with a window discriminator (6) whose output is connected via a logic circuit (7) to both the switches.</p> |
