| 摘要 |
PURPOSE: An alarm unit of full electronic switching system is provided to accomplish a fine appearance of a full electronic switching system and remove an inconvenience in a line working by not installing a cable between the switching system and an external environment fault detect unit by transmitting a fault detect signal from the external environment fault detect unit to a corresponding switching system as a radio signal. CONSTITUTION: An alarm signal transmitting unit(II) includes a fire sensor(25), temperature sensor(26), a door opening sensor(27), a moisture sensor(28), a wet sensor(29), and a plurality of radio signal transmitting parts(25A,26A,27A,28A,29A) which are one-to-one connected to the sensors(25, 26, 27, 28, 29) and transmits a radio signal of predetermined frequency on the basis of a detect signal outputted from each sensors(25,26,27,28,29). Preferably, the radio signal transmitting parts(25A,26A,27A,28A,29A) includes an oscillator for outputting different oscillation frequencies and a frequency signal outputted from the oscillator is transmitted as a radio signal. A radio signal receiving unit(32) receives a radio signal outputted from the alarm signal transmitting unit(II). A code analyzer(30) analyzes a predetermined code on the basis of a frequency of the radio signal received from the radio signal receiving unit(32) and applies a code analysis result to a RAPU(10). The RAPU(10) turns on a lamp for indicating each fault occurrence state on the code analysis result and warns of the fault occurrence state to an operator.
|
