| 摘要 |
In a circuit arrangement, comprising a flashing relay which is driven by parallel-connected interference signalling contacts, and with a latching circuit for collective acoustic interference signalling and a permanent contact for externally forwarding the interference signal, only one interference signalling contact (F1...Fn) is provided for each signalling point (H1) for driving the flashing circuit (K1), due to the closure of which interference signalling contact the voltage for the flashing circuit (K1) is built up via a rectifier (U) followed by an amplifier (V) and, as a result, the latching circuit (K2) and the permanent interference signalling circuit (K3) for collective acoustic interference signalling and for the external forwarding of the interference signal are supplied at the same time. <IMAGE>
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