| 摘要 |
<p>Fire detector (1) connected to two conductors (3, 4) held under power by an alarm control panel (5). The fire detector includes a transistor (T) connected in series to at least one resistor (R1) located between the two conductors, and an alarm sensor (7) connected to a microprocessor (6) controlling the transistor so as to optionally activate it based on the signal from the sensor. According to the invention, the central processing unit contains at least two programmes, one of which activates the transistor during a predetermined period, while the other ensures the rapid and sequential activation and de-activation of the transistor. The microprocessor also includes a memory (6c) which contains a code for selecting one of the programmes.</p> |
