| 摘要 |
The smoke fire alarm device comprises two terminals to connect to a fire loop, in the first of them is connecteda unidirectional conductance element output, the output being connected with the first shaper electric power supply output of smoke registration signal, the second electric power supply output being connected with the common bus and with the second terminal for connection of the fire loop, the output is connected with a visual display. The smoke registration signal shaper output is connected to a high-order digit shift register output and to a clock generator inverting terminal, the output being connected with a current switch input and with a shift register inverting input. In addition there is a band-pass filter, the input being connected with amplifier output and the output is connected with a boundary element input, the second electric power supply output being connected to a high-order digit shift register. |
