The smoke alarm is network independent power?

Along with the national fire protection method of continuous improvement and fire protection inspection efforts continue to increase, many places are equipped with fire alarm, the most common than hotel, Library Networking type smoke local installation of alarm. The alarm is installed in the ceiling, some people doubt the smoke alarm, network type is what power? Is the independent power supply? To answer this question, it will alarm network system from the network fire speaking.

The library, a library of more than with a network of the smoke alarm, the alarm and the alarm, manual alarm device together, in the manner of parallel connection is connected to the alarm host above, as long as there is a monitoring point found fire information, will signal transmission to the host, the host through the signal operational work, after the confirmation to sound the fire alarm signal. The alarm device is connected with a bus, the bus power supply, power supply voltage 9-28V is commonly used, the alarm not separate external power supply.

So the network type smoke detectors are not independent and independent power supply power supply, smoke alarm common used mainly for household and other small areas.