M-BUS bus programmed electronic switch

Abstract

The invention discloses a M-BUS bus programmed electronic switch, which is suitable for a M-BUS bus intelligent meter reading system. Remote intelligent instruments are managed in groups. The M-BUS bus programmed electronic switch comprises a single-chip microcomputer, an emitter follower power supply, an electronic switch circuit, a M-BUS communication receiving circuit and a M-BUS communicationtransmission circuit. Each programmed electronic switch is provided with an effective ID of 1 byte. The signal receiving and return transmission of a M-BUS bus are realized by an analog to digital conversion (ADC) module, a comparator module and two sets of emitter follower circuits inside the single-chip microcomputer. A single-chip microcomputer system is provided with a power supply. The switchis directly controlled by an NPN triode through an IO interface of the single-chip microcomputer. The M-BUS bus programmed electronic switch has the characteristics of low cost and high reliability.

Description

Technical field: [0001] The invention relates to an M-BUS bus thread-controlled electronic switch, which is suitable for an M-BUS bus intelligent centralized copying system and manages remote intelligent instruments and meters in groups. Background technique: [0002] With the development of technology and the improvement of people's living standards, intelligent remote meter reading has become the demand of modern society. At the same time, the Meter-BUS bus that conforms to the EN1343-3 standard, referred to as the M-BUS bus network, because its communication only requires two-core wires , non-polarity input, and can be connected in star form, its construction is simple, greatly reduces the construction labor intensity, improves the stability of the system, and makes the communication network of the M-BUS bus widely used in remote digital meter reading systems and alarm monitoring systems However, with the increasing popularity of the remote meter reading system, more and ...

AI Technical Summary

Problems solved by technology

[0003] 1. The wired remote meter reading system uses AC power supply, which will introduce interference from the power grid, such as power surges and other interference, causing damage to the equipment;

[0004] 2. The large number of intelligent instruments and instruments carried by a single acquisition device makes the system huge. Once the connected slave device has a short circuit or other problem, it will become very troublesome to find out the fault point among dozens of slave nodes. Post-maintenance work is quite complicated;

[0005] 3. In order to solve the problem of power surge, many try to use battery power supply, but due to the limited capacity of the battery and the limited output current capability of the battery, the load capacity of the centralized acquisition equipment powered by the battery is limited, resulting in cost high problem

[0006] Due to a series of reasons, many wired remote meter reading systems will suffer from high maintenance cost and difficult maintenance after a few years, which makes many systems in a state of paralysis.

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