Firefighting bus remote constant-voltage power supply method based on input output module

Abstract

The invention discloses a firefighting bus remote constant-voltage power supply method based on an input output module, which comprises the steps that: (1) a fire alarm control unit outputs an equivalent voltage higher than a starting voltage of an intelligent part, and then regulation is carried out by the input output module so as to implement normal startup of the intelligent part and charging on an energy storage circuit positioned at the near end of a firefighting bus; and (2) the energy storage circuit continuously supplies power to the intelligent part at the tail end of the firefighting bus and a voltage difference of the intelligent part at the tail end is regulated in real time by the input output module so as to achieve effects that the intelligent part at the tail end is continuously kept in a normal working state and an integral fire alarm system is in a constant-voltage state, and the energy storage circuit still continuously stores energy when supplying power to the intelligent part at the tail end. The firefighting bus remote constant-voltage power supply method disclosed by the invention is ingenious in design and reliable in power supply; a mode of regulating the voltage difference on the basis of the input output module not only ensures normal startup and continuous working of the intelligent part at the tail end, but also improves stability of the fire alarm system in a continuous energy storage and discharging mode.

Description

technical field [0001] The invention relates to the technical field of fire protection, in particular to a long-distance constant voltage power supply method for a fire protection bus based on an input and output module. Background technique [0002] The fire alarm system is generally composed of a fire alarm controller, intelligent components and external equipment. The fire alarm system uses two buses for power supply and data transmission based on the bus. It has low investment cost and is easy to install. It is widely used in fire communication transmission. However, There is bound to be a certain impedance in the bus power supply line, causing the voltage of the fire alarm to decrease with the increase of the bus length, that is, the voltage drop, causing the voltage of the fire alarm to be lower than the working voltage of the terminal equipment, causing the terminal equipment to fail to work normally. [0003] At present, in order to solve the problem of the voltage d...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a long-distance constant voltage power supply method for fire bus based on input and output modules, which mainly solves the problems in the prior art that the terminal intelligent components are difficult to start and continue to work normally, the energy of the fire alarm system is unbalanced, and the stability is poor, etc. question

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